<?xml version="1.0" encoding="US-ASCII" ?>
    <!-- Field: Doc-Info; Name: Generator; Value: GoFiler Complete; Version: 4.24a -->
    <!-- Field: Doc-Info; Name: VendorURI; Value: http://www.novaworks.co -->
    <!-- Field: Doc-Info; Name: Source; Value: CLSN %2D 20180930 10Q Q3 DFN.xfr; Date: 2018%2D11%2D14T21:34:23Z -->
    <!-- Field: Doc-Info; Name: Status; Value: 0x80060000 -->
<xbrli:xbrl xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:dei="http://xbrl.sec.gov/dei/2018-01-31" xmlns:ref="http://www.xbrl.org/2006/ref" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:utr="http://www.xbrl.org/2009/utr" xmlns:us-gaap="http://fasb.org/us-gaap/2018-01-31" xmlns:us-roles="http://fasb.org/us-roles/2018-01-31" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:us-types="http://fasb.org/us-types/2018-01-31" xmlns:country="http://xbrl.sec.gov/country/2017-01-31" xmlns:srt="http://fasb.org/srt/2018-01-31" xmlns:CLSN="http://celsion.com/20180930">
    <link:schemaRef xlink:href="clsn-20180930.xsd" xlink:type="simple" />
    <xbrli:context id="From2018-01-01to2018-09-30">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-11-13">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-11-13</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-12-31">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-01-01to2017-09-30">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-01-01</xbrli:startDate>
        <xbrli:endDate>2017-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2016-12-31">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2016-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-09-30">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_us-gaap_CertificatesOfDepositMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:FinancialInstrumentAxis">us-gaap:CertificatesOfDepositMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-12-31_us-gaap_CertificatesOfDepositMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:FinancialInstrumentAxis">us-gaap:CertificatesOfDepositMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_us-gaap_CorporateDebtSecuritiesMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:FinancialInstrumentAxis">us-gaap:CorporateDebtSecuritiesMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-12-31_us-gaap_CorporateDebtSecuritiesMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:FinancialInstrumentAxis">us-gaap:CorporateDebtSecuritiesMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel1Member">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:FairValueByMeasurementFrequencyAxis">us-gaap:FairValueMeasurementsRecurringMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel1Member</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-12-31_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel1Member">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:FairValueByMeasurementFrequencyAxis">us-gaap:FairValueMeasurementsRecurringMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel1Member</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel2Member">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:FairValueByMeasurementFrequencyAxis">us-gaap:FairValueMeasurementsRecurringMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel2Member</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-12-31_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel2Member">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:FairValueByMeasurementFrequencyAxis">us-gaap:FairValueMeasurementsRecurringMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel2Member</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel3Member">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:FairValueByMeasurementFrequencyAxis">us-gaap:FairValueMeasurementsRecurringMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel3Member</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-12-31_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel3Member">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:FairValueByMeasurementFrequencyAxis">us-gaap:FairValueMeasurementsRecurringMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel3Member</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_us-gaap_FairValueMeasurementsRecurringMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:FairValueByMeasurementFrequencyAxis">us-gaap:FairValueMeasurementsRecurringMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-12-31_us-gaap_FairValueMeasurementsRecurringMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:FairValueByMeasurementFrequencyAxis">us-gaap:FairValueMeasurementsRecurringMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-06-15to2017-06-16_custom_EGENIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-06-15</xbrli:startDate>
        <xbrli:endDate>2017-06-16</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2014-06-01to2014-06-20_custom_EGENIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2014-06-01</xbrli:startDate>
        <xbrli:endDate>2014-06-20</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-01-01to2018-09-30_custom_EGENIncMember_custom_IPRAndDDrugTechnologyPlatformsMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="dei:LegalEntityAxis">CLSN:IPRAndDDrugTechnologyPlatformsMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2014-06-01to2014-06-20_custom_EGENIncMember_us-gaap_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2014-06-01</xbrli:startDate>
        <xbrli:endDate>2014-06-20</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-07-01to2017-09-30_custom_EGENIncMember_custom_GlioblastomaMultiformeBrainCancerMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:ContingentConsiderationByTypeAxis">CLSN:GlioblastomaMultiformeBrainCancerMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-07-01</xbrli:startDate>
        <xbrli:endDate>2017-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-01-01to2018-09-30_custom_EGENIncMember_custom_PurchaseAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:PurchaseAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2016-12-01to2016-12-31_custom_IPRAndDDrugTechnologyPlatformsMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="dei:LegalEntityAxis">CLSN:IPRAndDDrugTechnologyPlatformsMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2016-12-01</xbrli:startDate>
        <xbrli:endDate>2016-12-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-01-01to2017-09-30_custom_EGENIncMember_custom_GlioblastomaMultiformeBrainCancerMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:ContingentConsiderationByTypeAxis">CLSN:GlioblastomaMultiformeBrainCancerMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-01-01</xbrli:startDate>
        <xbrli:endDate>2017-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_custom_EGENIncMember_custom_OvarianCancerMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:ContingentConsiderationByTypeAxis">CLSN:OvarianCancerMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_custom_EGENIncMember_custom_GlioblastomaMultiformeBrainCancerMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:ContingentConsiderationByTypeAxis">CLSN:GlioblastomaMultiformeBrainCancerMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-12-31_custom_EGENIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2014-06-20_custom_EGENIncMember_us-gaap_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2014-06-20</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_custom_EGENIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2014-06-01to2014-06-10_custom_HerculesCreditAgreementMember_custom_SecondTrancheMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:VestingAxis">CLSN:SecondTrancheMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2014-06-01</xbrli:startDate>
        <xbrli:endDate>2014-06-10</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2014-06-01to2014-06-10_custom_EGENIncMember_custom_HerculesCreditAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2014-06-01</xbrli:startDate>
        <xbrli:endDate>2014-06-10</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2013-12-01to2014-06-10_custom_HerculesMember_custom_HerculesCreditAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:CounterpartyNameAxis">CLSN:HerculesMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2013-12-01</xbrli:startDate>
        <xbrli:endDate>2014-06-10</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-06-26">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-06-26</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-06-09_us-gaap_WarrantMember_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:StatementEquityComponentsAxis">us-gaap:WarrantMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-06-09</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2014-06-10_custom_HerculesWarrantMember_custom_HerculesCreditAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:HerculesWarrantMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2014-06-10</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2014-06-10_custom_HerculesWarrantMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:HerculesWarrantMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2014-06-10</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2013-11-30_custom_HerculesMember_custom_HerculesCreditAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:CounterpartyNameAxis">CLSN:HerculesMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2013-11-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2013-11-25_custom_HerculesWarrantMember_custom_HerculesCreditAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:HerculesWarrantMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2013-11-25</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-07-01to2017-09-30">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-07-01</xbrli:startDate>
        <xbrli:endDate>2017-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-01-01to2017-09-30_custom_EGENIncMember_custom_PurchaseAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:PurchaseAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-01-01</xbrli:startDate>
        <xbrli:endDate>2017-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_custom_PurchaseAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:PurchaseAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-12-31_custom_PurchaseAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:PurchaseAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-01-01to2018-09-30_custom_EGENIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2013-11-30_custom_LoanAgreementMember_custom_HerculesTechnologyGrowthCapitalIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:LoanAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="dei:LegalEntityAxis">CLSN:HerculesTechnologyGrowthCapitalIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2013-11-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-01-01to2018-09-30_us-gaap_EmployeeStockOptionMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:AwardTypeAxis">us-gaap:EmployeeStockOptionMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_custom_TwoThousandAndSevenStockIncentivePlanMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:PlanNameAxis">CLSN:TwoThousandAndSevenStockIncentivePlanMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:PlanNameAxis">CLSN:TwoThousandAndEighteenStockIncentivePlanMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_custom_EquityStockAwardsMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:AwardTypeAxis">CLSN:EquityStockAwardsMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-01-01to2018-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:PlanNameAxis">CLSN:TwoThousandAndEighteenStockIncentivePlanMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-01-01to2017-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:PlanNameAxis">CLSN:TwoThousandAndEighteenStockIncentivePlanMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-01-01</xbrli:startDate>
        <xbrli:endDate>2017-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2013-11-11to2013-11-30_custom_HerculesCreditAgreementMember_custom_FirstTrancheMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:VestingAxis">CLSN:FirstTrancheMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2013-11-11</xbrli:startDate>
        <xbrli:endDate>2013-11-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2015-12-18to2016-12-15_custom_HerculesCreditAgreementMember_us-gaap_PrimeRateMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:VariableRateAxis">us-gaap:PrimeRateMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2015-12-18</xbrli:startDate>
        <xbrli:endDate>2016-12-15</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2013-11-01to2015-12-17_custom_HerculesCreditAgreementMember_us-gaap_PrimeRateMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:VariableRateAxis">us-gaap:PrimeRateMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2013-11-01</xbrli:startDate>
        <xbrli:endDate>2015-12-17</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-03-16to2018-09-30_custom_HerculesCreditAgreementMember_us-gaap_PrimeRateMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:VariableRateAxis">us-gaap:PrimeRateMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-03-16</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2013-11-24to2013-11-25_custom_HerculesWarrantMember_custom_HerculesCreditAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:HerculesWarrantMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2013-11-24</xbrli:startDate>
        <xbrli:endDate>2013-11-25</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2014-06-10_custom_HerculesCreditAgreementMember_custom_SecondTrancheMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:VestingAxis">CLSN:SecondTrancheMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2014-06-10</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2014-06-09to2014-06-10_custom_HerculesCreditAgreementMember_custom_SecondTrancheMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:VestingAxis">CLSN:SecondTrancheMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2014-06-09</xbrli:startDate>
        <xbrli:endDate>2014-06-10</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-01-01to2018-09-30_custom_EquityStockAwardsMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:AwardTypeAxis">CLSN:EquityStockAwardsMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-01-01to2018-09-30_us-gaap_RestrictedStockMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:AwardTypeAxis">us-gaap:RestrictedStockMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-12-31_us-gaap_EmployeeStockOptionMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:AwardTypeAxis">us-gaap:EmployeeStockOptionMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_us-gaap_EmployeeStockOptionMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:AwardTypeAxis">us-gaap:EmployeeStockOptionMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-12-31_us-gaap_RestrictedStockMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:AwardTypeAxis">us-gaap:RestrictedStockMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_us-gaap_RestrictedStockMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:AwardTypeAxis">us-gaap:RestrictedStockMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2014-06-20_custom_EGENIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2014-06-20</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2014-06-19to2014-06-20_custom_EGENIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2014-06-19</xbrli:startDate>
        <xbrli:endDate>2014-06-20</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2014-06-20_custom_EGENIncMember_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2014-06-20</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-01-01to2017-12-31_custom_EGENIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-01-01</xbrli:startDate>
        <xbrli:endDate>2017-12-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-01-01to2017-09-30_custom_EGENIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-01-01</xbrli:startDate>
        <xbrli:endDate>2017-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2016-01-01to2016-12-31_custom_EGENIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2016-01-01</xbrli:startDate>
        <xbrli:endDate>2016-12-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2014-06-19to2014-06-20_custom_EGENIncMember_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2014-06-19</xbrli:startDate>
        <xbrli:endDate>2014-06-20</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2014-06-19to2014-06-20_custom_EGENIncMember_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2014-06-19</xbrli:startDate>
        <xbrli:endDate>2014-06-20</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-12-31_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-09-30_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2016-12-31_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2016-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-12-31_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-09-30_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2016-12-31_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2016-12-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-01-01to2018-09-30_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-01-01to2017-12-31_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-01-01</xbrli:startDate>
        <xbrli:endDate>2017-12-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-01-01to2017-09-30_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-01-01</xbrli:startDate>
        <xbrli:endDate>2017-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2016-01-01to2016-12-31_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2016-01-01</xbrli:startDate>
        <xbrli:endDate>2016-12-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-01-01to2018-09-30_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-01-01to2017-12-31_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-01-01</xbrli:startDate>
        <xbrli:endDate>2017-12-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-01-01to2017-09-30_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-01-01</xbrli:startDate>
        <xbrli:endDate>2017-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2016-01-01to2016-12-31_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2016-01-01</xbrli:startDate>
        <xbrli:endDate>2016-12-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2011-07-31_custom_LawrencevilleNewJerseyMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:LeaseArrangementTypeAxis">CLSN:LawrencevilleNewJerseyMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2011-07-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2011-07-01to2011-07-31_custom_LawrencevilleNewJerseyMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:LeaseArrangementTypeAxis">CLSN:LawrencevilleNewJerseyMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2011-07-01</xbrli:startDate>
        <xbrli:endDate>2011-07-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2012-04-01to2012-04-30_custom_LawrencevilleNewJerseyMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:LeaseArrangementTypeAxis">CLSN:LawrencevilleNewJerseyMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2012-04-01</xbrli:startDate>
        <xbrli:endDate>2012-04-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2012-04-30_us-gaap_StandbyLettersOfCreditMember_custom_LawrencevilleNewJerseyMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:CreditFacilityAxis">us-gaap:StandbyLettersOfCreditMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:LeaseArrangementTypeAxis">CLSN:LawrencevilleNewJerseyMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2012-04-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2012-04-30_us-gaap_StandbyLettersOfCreditMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:CreditFacilityAxis">us-gaap:StandbyLettersOfCreditMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2012-04-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-04-30_custom_LawrencevilleNewJerseyMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:LeaseArrangementTypeAxis">CLSN:LawrencevilleNewJerseyMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-04-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-04-01to2017-04-30_custom_LawrencevilleNewJerseyMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:LeaseArrangementTypeAxis">CLSN:LawrencevilleNewJerseyMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-04-01</xbrli:startDate>
        <xbrli:endDate>2017-04-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-01-01to2018-01-31_custom_EGENAssetPurchaseAgreementMember_custom_HuntsvilleAlabamaMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:EGENAssetPurchaseAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:LeaseArrangementTypeAxis">CLSN:HuntsvilleAlabamaMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-01-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2014-09-30_custom_EGENAssetPurchaseAgreementMember_custom_HuntsvilleAlabamaMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:EGENAssetPurchaseAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:LeaseArrangementTypeAxis">CLSN:HuntsvilleAlabamaMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2014-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-01-31_custom_EGENAssetPurchaseAgreementMember_custom_HuntsvilleAlabamaMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:EGENAssetPurchaseAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:LeaseArrangementTypeAxis">CLSN:HuntsvilleAlabamaMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-01-31</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2013-01-17to2013-01-18_custom_HisunMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis">CLSN:HisunMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2013-01-17</xbrli:startDate>
        <xbrli:endDate>2013-01-18</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2015-09-01to2015-09-30">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2015-09-01</xbrli:startDate>
        <xbrli:endDate>2015-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2016-09-30_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2016-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2016-09-30_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2016-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2016-09-30">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2016-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-05-21to2017-05-26">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-05-21</xbrli:startDate>
        <xbrli:endDate>2017-05-26</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-05-16">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-05-16</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-05-16_us-gaap_WarrantMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:StatementEquityComponentsAxis">us-gaap:WarrantMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-05-16</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-10-25to2017-10-27_custom_UnderwritingAgreementMember_custom_OppenheimerAndCoIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:UnderwritingAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="dei:LegalEntityAxis">CLSN:OppenheimerAndCoIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-10-25</xbrli:startDate>
        <xbrli:endDate>2017-10-27</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-10-27_custom_UnderwritingAgreementMember_custom_OppenheimerAndCoIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:UnderwritingAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="dei:LegalEntityAxis">CLSN:OppenheimerAndCoIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-10-27</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-10-27_custom_UnderwritingAgreementMember_custom_OppenheimerAndCoIncMember_custom_InvestorWarrantMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:UnderwritingAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="dei:LegalEntityAxis">CLSN:OppenheimerAndCoIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:StatementEquityComponentsAxis">CLSN:InvestorWarrantMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-10-27</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-10-27_us-gaap_WarrantMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:StatementEquityComponentsAxis">us-gaap:WarrantMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-10-27</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-10-21to2018-10-27_us-gaap_WarrantMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:StatementEquityComponentsAxis">us-gaap:WarrantMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-10-21</xbrli:startDate>
        <xbrli:endDate>2018-10-27</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-10-26to2017-10-27_custom_October2017UnderwrittenOfferingMember_custom_InvestorWarrantMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:October2017UnderwrittenOfferingMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:StatementEquityComponentsAxis">CLSN:InvestorWarrantMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-10-26</xbrli:startDate>
        <xbrli:endDate>2017-10-27</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-10-27_custom_October2017UnderwrittenOfferingMember_custom_InvestorWarrantMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:October2017UnderwrittenOfferingMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:StatementEquityComponentsAxis">CLSN:InvestorWarrantMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-10-27</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-07-05to2017-07-06_custom_July2017DirectOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:July2017DirectOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-07-05</xbrli:startDate>
        <xbrli:endDate>2017-07-06</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-07-05to2017-07-06_custom_PreFundedSeriesCCCWarrantsMember_custom_July2017DirectOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:PreFundedSeriesCCCWarrantsMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:July2017DirectOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-07-05</xbrli:startDate>
        <xbrli:endDate>2017-07-06</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-07-06_custom_July2017DirectOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:July2017DirectOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-07-06</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-07-06_custom_PreFundedSeriesCCCWarrantsMember_custom_July2017DirectOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:PreFundedSeriesCCCWarrantsMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:July2017DirectOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-07-06</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-07-06_custom_SeriesAAAWarrantsMember_custom_July2017DirectOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:SeriesAAAWarrantsMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:July2017DirectOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-07-06</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-07-06_custom_SeriesBBBWarrantsMember_custom_July2017DirectOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:SeriesBBBWarrantsMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:July2017DirectOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-07-06</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-10-01to2017-12-31_custom_PreFundedSeriesCCCWarrantsMember_custom_July2017DirectOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:PreFundedSeriesCCCWarrantsMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:July2017DirectOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-10-01</xbrli:startDate>
        <xbrli:endDate>2017-12-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-10-04_custom_July2017DirectOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:July2017DirectOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-10-04</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-10-04_custom_July2017DirectOfferingMember_custom_SeriesAAAWarrantsMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:July2017DirectOfferingMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:SeriesAAAWarrantsMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-10-04</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-10-04_custom_July2017DirectOfferingMember_custom_SeriesBBBWarrantsMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:July2017DirectOfferingMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:SeriesBBBWarrantsMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-10-04</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-10-03to2017-10-04_custom_July2017DirectOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:July2017DirectOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-10-03</xbrli:startDate>
        <xbrli:endDate>2017-10-04</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-10-04_custom_SeriesDDDWarrantsMember_custom_July2017DirectOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:SeriesDDDWarrantsMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:July2017DirectOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-10-04</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-02-13to2017-02-14_custom_February142017PublicOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:February142017PublicOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-02-13</xbrli:startDate>
        <xbrli:endDate>2017-02-14</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-02-14_custom_SeriesAAWarrantMember_custom_February142017PublicOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:SeriesAAWarrantMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:February142017PublicOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-02-14</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-02-13to2017-02-14_custom_SeriesAAWarrantMember_custom_February142017PublicOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:SeriesAAWarrantMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:February142017PublicOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-02-13</xbrli:startDate>
        <xbrli:endDate>2017-02-14</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-02-14_custom_PreFundedSeriesBBWarrantMember_custom_February142017PublicOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:PreFundedSeriesBBWarrantMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:February142017PublicOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-02-14</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-02-14_custom_February142017PublicOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:February142017PublicOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-02-14</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-01-01to2017-12-31_custom_PreFundedSeriesBBWarrantMember_custom_February142017PublicOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:PreFundedSeriesBBWarrantMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:February142017PublicOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-01-01</xbrli:startDate>
        <xbrli:endDate>2017-12-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="d_2017-01-01_2017-12-31_ClassOfWarrantOrRightAxis-SeriesAAWarrantMember_SubsidiarySaleOfStockAxis-February142017PublicOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:SeriesAAWarrantMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:February142017PublicOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-01-01</xbrli:startDate>
        <xbrli:endDate>2017-12-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2013-02-22_srt_MaximumMember_us-gaap_WarrantMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:StatementEquityComponentsAxis">us-gaap:WarrantMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2013-02-22</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2014-01-15_us-gaap_WarrantMember_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:StatementEquityComponentsAxis">us-gaap:WarrantMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2014-01-15</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-06-08to2017-06-09_custom_TwoThousandThirteenWarrants2014WarrantsAndJune2016WarrantsMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:TwoThousandThirteenWarrants2014WarrantsAndJune2016WarrantsMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-06-08</xbrli:startDate>
        <xbrli:endDate>2017-06-09</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2015-05-27_custom_TwoThousandFifteenWarrantsMember_custom_May2015CommonStockOfferingMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:TwoThousandFifteenWarrantsMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:May2015CommonStockOfferingMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2015-05-27</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2013-05-02to2018-09-30_custom_ATMAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:ATMAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2013-05-02</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2015-05-26to2015-05-27_custom_TwoThousandFifteenWarrantsMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:TwoThousandFifteenWarrantsMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2015-05-26</xbrli:startDate>
        <xbrli:endDate>2015-05-27</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2015-05-26to2015-05-27_custom_JuneTwoThousandAndSixrteenWarrantsMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:JuneTwoThousandAndSixrteenWarrantsMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2015-05-26</xbrli:startDate>
        <xbrli:endDate>2015-05-27</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-07-01to2018-09-30">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-07-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-04-01to2017-06-30">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-04-01</xbrli:startDate>
        <xbrli:endDate>2017-06-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_custom_NewJerseyMember_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:StatementGeographicalAxis">CLSN:NewJerseyMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-07-01to2018-09-30_custom_EGENIncMember_custom_PurchaseAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:PurchaseAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-07-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-07-01to2017-09-30_custom_EGENIncMember_custom_PurchaseAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:PurchaseAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-07-01</xbrli:startDate>
        <xbrli:endDate>2017-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-06-27_custom_LoanAgreementMember_custom_HorizonTechnologyFinanceCorporationMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:LoanAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="dei:LegalEntityAxis">CLSN:HorizonTechnologyFinanceCorporationMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-06-27</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-06-26to2018-06-27_custom_HorizonCreditAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:TypeOfArrangementAxis">CLSN:HorizonCreditAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-06-26</xbrli:startDate>
        <xbrli:endDate>2018-06-27</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-01-01to2018-09-30_custom_HorizonCreditAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HorizonCreditAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_custom_HorizonWarrantMember_custom_HorizonCreditAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:HorizonWarrantMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HorizonCreditAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_custom_HorizonMember_custom_HorizonCreditAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:CounterpartyNameAxis">CLSN:HorizonMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HorizonCreditAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-01-01to2018-09-30_custom_HerculesCreditAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-01-01to2018-09-30_custom_HorizonWarrantMember_custom_HorizonCreditAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:ClassOfWarrantOrRightAxis">CLSN:HorizonWarrantMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HorizonCreditAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-07-01to2018-09-30_custom_HorizonCreditAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HorizonCreditAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-07-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-07-01to2017-09-30_custom_HerculesCreditAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HerculesCreditAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-07-01</xbrli:startDate>
        <xbrli:endDate>2017-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:PlanNameAxis">CLSN:TwoThousandAndEighteenStockIncentivePlanMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-07-01to2018-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:PlanNameAxis">CLSN:TwoThousandAndEighteenStockIncentivePlanMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-07-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-07-01to2017-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:PlanNameAxis">CLSN:TwoThousandAndEighteenStockIncentivePlanMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-07-01</xbrli:startDate>
        <xbrli:endDate>2017-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-07-01to2018-09-30_custom_EGENIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-07-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-07-01to2017-09-30_custom_EGENIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-07-01</xbrli:startDate>
        <xbrli:endDate>2017-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-06-30_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-06-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-06-30_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-06-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-06-30_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-06-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-06-30_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-06-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-06-30">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-06-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2017-06-30">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2017-06-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2013-06-30">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2013-06-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2013-01-01to2013-03-31">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2013-01-01</xbrli:startDate>
        <xbrli:endDate>2013-03-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_custom_HorizonCreditAgreementMember_us-gaap_LondonInterbankOfferedRateLIBORMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">CLSN:HorizonCreditAgreementMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:VariableRateAxis">us-gaap:LondonInterbankOfferedRateLIBORMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-05-15to2017-05-16">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-05-15</xbrli:startDate>
        <xbrli:endDate>2017-05-16</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2016-10-01to2016-12-31_custom_IPRAndDDrugTechnologyPlatformsMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="dei:LegalEntityAxis">CLSN:IPRAndDDrugTechnologyPlatformsMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2016-10-01</xbrli:startDate>
        <xbrli:endDate>2016-12-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-04-01to2018-06-30">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-04-01</xbrli:startDate>
        <xbrli:endDate>2018-06-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-08-01to2018-08-31_custom_AspirePurchaseAgreementMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:SubsidiarySaleOfStockAxis">CLSN:AspirePurchaseAgreementMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-08-01</xbrli:startDate>
        <xbrli:endDate>2018-08-31</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-28_custom_InducementOptionGrantsMember_custom_ThreeNewEmployeesMember_us-gaap_CommonStockMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:PlanNameAxis">CLSN:InducementOptionGrantsMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:TitleOfIndividualAxis">CLSN:ThreeNewEmployeesMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:StatementEquityComponentsAxis">us-gaap:CommonStockMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-28</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-09-27to2018-09-28_custom_InducementOptionGrantsMember_custom_ThreeNewEmployeesMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:PlanNameAxis">CLSN:InducementOptionGrantsMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:TitleOfIndividualAxis">CLSN:ThreeNewEmployeesMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-09-27</xbrli:startDate>
        <xbrli:endDate>2018-09-28</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-09-01to2018-09-30_custom_InducementOptionGrantsMember_custom_ThreeNewEmployeesMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:PlanNameAxis">CLSN:InducementOptionGrantsMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:TitleOfIndividualAxis">CLSN:ThreeNewEmployeesMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-09-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-04-01to2018-06-30_custom_EGENIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-04-01</xbrli:startDate>
        <xbrli:endDate>2018-06-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-04-01to2017-06-30_custom_EGENIncMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:BusinessAcquisitionAxis">CLSN:EGENIncMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-04-01</xbrli:startDate>
        <xbrli:endDate>2017-06-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-04-01to2018-06-30_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-04-01</xbrli:startDate>
        <xbrli:endDate>2018-06-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-04-01to2018-06-30_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-04-01</xbrli:startDate>
        <xbrli:endDate>2018-06-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-04-01to2017-06-30_srt_MinimumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-04-01</xbrli:startDate>
        <xbrli:endDate>2017-06-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2017-04-01to2017-06-30_srt_MaximumMember">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2017-04-01</xbrli:startDate>
        <xbrli:endDate>2017-06-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-28_custom_InducementOptionGrantsMember_custom_ThreeNewEmployeesMember_us-gaap_RestrictedStockMember98962541">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:PlanNameAxis">CLSN:InducementOptionGrantsMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:TitleOfIndividualAxis">CLSN:ThreeNewEmployeesMember</xbrldi:explicitMember>
          <xbrldi:explicitMember dimension="us-gaap:AwardTypeAxis">us-gaap:RestrictedStockMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-28</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="AsOf2018-09-30_custom_OctoberTwentynineTwoThousandEighteenMember100073798">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:AwardDateAxis">CLSN:OctoberTwentynineTwoThousandEighteenMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:instant>2018-09-30</xbrli:instant>
      </xbrli:period>
    </xbrli:context>
    <xbrli:context id="From2018-01-01to2018-09-30_custom_OctoberTwentynineTwoThousandEighteenMember100122206">
      <xbrli:entity>
        <xbrli:identifier scheme="http://www.sec.gov/CIK">0000749647</xbrli:identifier>
        <xbrli:segment>
          <xbrldi:explicitMember dimension="us-gaap:AwardDateAxis">CLSN:OctoberTwentynineTwoThousandEighteenMember</xbrldi:explicitMember>
        </xbrli:segment>
      </xbrli:entity>
      <xbrli:period>
        <xbrli:startDate>2018-01-01</xbrli:startDate>
        <xbrli:endDate>2018-09-30</xbrli:endDate>
      </xbrli:period>
    </xbrli:context>
    <xbrli:unit id="USD">
      <xbrli:measure>iso4217:USD</xbrli:measure>
    </xbrli:unit>
    <xbrli:unit id="Shares">
      <xbrli:measure>xbrli:shares</xbrli:measure>
    </xbrli:unit>
    <xbrli:unit id="USDPShares">
      <xbrli:divide>
        <xbrli:unitNumerator>
          <xbrli:measure>iso4217:USD</xbrli:measure>
        </xbrli:unitNumerator>
        <xbrli:unitDenominator>
          <xbrli:measure>xbrli:shares</xbrli:measure>
        </xbrli:unitDenominator>
      </xbrli:divide>
    </xbrli:unit>
    <xbrli:unit id="Percentage">
      <xbrli:measure>xbrli:pure</xbrli:measure>
    </xbrli:unit>
    <xbrli:unit id="Sqft">
      <xbrli:measure>utr:sqft</xbrli:measure>
    </xbrli:unit>
    <dei:EntityRegistrantName contextRef="From2018-01-01to2018-09-30">Celsion CORP</dei:EntityRegistrantName>
    <dei:EntityCentralIndexKey contextRef="From2018-01-01to2018-09-30">0000749647</dei:EntityCentralIndexKey>
    <dei:DocumentType contextRef="From2018-01-01to2018-09-30">10-Q</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="From2018-01-01to2018-09-30">2018-09-30</dei:DocumentPeriodEndDate>
    <dei:AmendmentFlag contextRef="From2018-01-01to2018-09-30">false</dei:AmendmentFlag>
    <dei:CurrentFiscalYearEndDate contextRef="From2018-01-01to2018-09-30">--12-31</dei:CurrentFiscalYearEndDate>
    <dei:EntityFilerCategory contextRef="From2018-01-01to2018-09-30">Non-accelerated Filer</dei:EntityFilerCategory>
    <dei:DocumentFiscalPeriodFocus contextRef="From2018-01-01to2018-09-30">Q3</dei:DocumentFiscalPeriodFocus>
    <dei:EntityCommonStockSharesOutstanding contextRef="AsOf2018-11-13" unitRef="Shares" decimals="INF">18731834</dei:EntityCommonStockSharesOutstanding>
    <dei:TradingSymbol contextRef="From2018-01-01to2018-09-30">CLSN</dei:TradingSymbol>
    <us-gaap:PropertyPlantAndEquipmentNet contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">166523</us-gaap:PropertyPlantAndEquipmentNet>
    <us-gaap:PropertyPlantAndEquipmentNet contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">175771</us-gaap:PropertyPlantAndEquipmentNet>
    <us-gaap:AssetsCurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">22252394</us-gaap:AssetsCurrent>
    <us-gaap:AssetsCurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">24311701</us-gaap:AssetsCurrent>
    <us-gaap:GrantsReceivableCurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">224614</us-gaap:GrantsReceivableCurrent>
    <us-gaap:GrantsReceivableCurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">89186</us-gaap:GrantsReceivableCurrent>
    <us-gaap:AccruedInvestmentIncomeReceivable contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">76746</us-gaap:AccruedInvestmentIncomeReceivable>
    <us-gaap:AccruedInvestmentIncomeReceivable contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">54440</us-gaap:AccruedInvestmentIncomeReceivable>
    <us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">18579731</us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent>
    <us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">12724020</us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent>
    <us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent contextRef="AsOf2018-09-30_us-gaap_CertificatesOfDepositMember" unitRef="USD" decimals="0">3144875</us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent>
    <us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent contextRef="AsOf2017-12-31_us-gaap_CertificatesOfDepositMember" unitRef="USD" xsi:nil="true" />
    <us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent contextRef="AsOf2018-09-30_us-gaap_CorporateDebtSecuritiesMember" unitRef="USD" decimals="0">15434856</us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent>
    <us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent contextRef="AsOf2017-12-31_us-gaap_CorporateDebtSecuritiesMember" unitRef="USD" decimals="0">12724020</us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent>
    <us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent contextRef="AsOf2018-09-30_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel1Member" unitRef="USD" decimals="0">18579731</us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent>
    <us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent contextRef="AsOf2017-12-31_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel1Member" unitRef="USD" decimals="0">12724020</us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent>
    <us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent contextRef="AsOf2018-09-30_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel2Member" unitRef="USD" xsi:nil="true" />
    <us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent contextRef="AsOf2017-12-31_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel2Member" unitRef="USD" xsi:nil="true" />
    <us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent contextRef="AsOf2018-09-30_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel3Member" unitRef="USD" xsi:nil="true" />
    <us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent contextRef="AsOf2017-12-31_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel3Member" unitRef="USD" xsi:nil="true" />
    <us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent contextRef="AsOf2018-09-30_us-gaap_FairValueMeasurementsRecurringMember" unitRef="USD" decimals="0">18579731</us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent>
    <us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent contextRef="AsOf2017-12-31_us-gaap_FairValueMeasurementsRecurringMember" unitRef="USD" decimals="0">12724020</us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent>
    <us-gaap:Assets contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">40911954</us-gaap:Assets>
    <us-gaap:Assets contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">47514433</us-gaap:Assets>
    <us-gaap:Assets contextRef="AsOf2018-09-30_custom_EGENIncMember_custom_OvarianCancerMember" unitRef="USD" decimals="0">2400000</us-gaap:Assets>
    <us-gaap:AssetsNoncurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">18493037</us-gaap:AssetsNoncurrent>
    <us-gaap:AssetsNoncurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">23026961</us-gaap:AssetsNoncurrent>
    <us-gaap:DepositsAssetsNoncurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">155324</us-gaap:DepositsAssetsNoncurrent>
    <us-gaap:DepositsAssetsNoncurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">8761</us-gaap:DepositsAssetsNoncurrent>
    <us-gaap:Goodwill contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">1976101</us-gaap:Goodwill>
    <us-gaap:Goodwill contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">1976101</us-gaap:Goodwill>
    <us-gaap:Goodwill contextRef="AsOf2018-09-30_custom_EGENIncMember" unitRef="USD" decimals="0">1976000</us-gaap:Goodwill>
    <us-gaap:FiniteLivedIntangibleAssetsNet contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">625121</us-gaap:FiniteLivedIntangibleAssetsNet>
    <us-gaap:FiniteLivedIntangibleAssetsNet contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">795608</us-gaap:FiniteLivedIntangibleAssetsNet>
    <us-gaap:FiniteLivedIntangibleAssetsNet contextRef="AsOf2018-09-30_custom_PurchaseAgreementMember" unitRef="USD" decimals="0">625121</us-gaap:FiniteLivedIntangibleAssetsNet>
    <us-gaap:FiniteLivedIntangibleAssetsNet contextRef="AsOf2017-12-31_custom_PurchaseAgreementMember" unitRef="USD" decimals="0">795608</us-gaap:FiniteLivedIntangibleAssetsNet>
    <us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">15736491</us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill>
    <us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">20246491</us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill>
    <us-gaap:Liabilities contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">25780889</us-gaap:Liabilities>
    <us-gaap:Liabilities contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">20809925</us-gaap:Liabilities>
    <us-gaap:OtherLiabilitiesNoncurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">65701</us-gaap:OtherLiabilitiesNoncurrent>
    <us-gaap:OtherLiabilitiesNoncurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">71710</us-gaap:OtherLiabilitiesNoncurrent>
    <us-gaap:DeferredRevenueNoncurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">1625000</us-gaap:DeferredRevenueNoncurrent>
    <us-gaap:DeferredRevenueNoncurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">2000000</us-gaap:DeferredRevenueNoncurrent>
    <us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">8970854</us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent>
    <us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">12538525</us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent>
    <us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent contextRef="AsOf2018-09-30_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel1Member" unitRef="USD" xsi:nil="true" />
    <us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent contextRef="AsOf2017-12-31_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel1Member" unitRef="USD" xsi:nil="true" />
    <us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent contextRef="AsOf2018-09-30_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel2Member" unitRef="USD" xsi:nil="true" />
    <us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent contextRef="AsOf2017-12-31_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel2Member" unitRef="USD" xsi:nil="true" />
    <us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent contextRef="AsOf2018-09-30_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel3Member" unitRef="USD" decimals="0">8970854</us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent>
    <us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent contextRef="AsOf2017-12-31_us-gaap_FairValueMeasurementsRecurringMember_us-gaap_FairValueInputsLevel3Member" unitRef="USD" decimals="0">12538525</us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent>
    <us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent contextRef="AsOf2018-09-30_us-gaap_FairValueMeasurementsRecurringMember" unitRef="USD" decimals="0">8970854</us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent>
    <us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent contextRef="AsOf2017-12-31_us-gaap_FairValueMeasurementsRecurringMember" unitRef="USD" decimals="0">12538525</us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent>
    <us-gaap:LiabilitiesCurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">5799755</us-gaap:LiabilitiesCurrent>
    <us-gaap:LiabilitiesCurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">6199690</us-gaap:LiabilitiesCurrent>
    <us-gaap:DeferredRevenueCurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">500000</us-gaap:DeferredRevenueCurrent>
    <us-gaap:DeferredRevenueCurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">500000</us-gaap:DeferredRevenueCurrent>
    <us-gaap:AccruedLiabilitiesCurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">2140128</us-gaap:AccruedLiabilitiesCurrent>
    <us-gaap:AccruedLiabilitiesCurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">2282827</us-gaap:AccruedLiabilitiesCurrent>
    <us-gaap:AccountsPayableCurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">3159627</us-gaap:AccountsPayableCurrent>
    <us-gaap:AccountsPayableCurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">3416863</us-gaap:AccountsPayableCurrent>
    <us-gaap:LiabilitiesAndStockholdersEquity contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">40911954</us-gaap:LiabilitiesAndStockholdersEquity>
    <us-gaap:LiabilitiesAndStockholdersEquity contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">47514433</us-gaap:LiabilitiesAndStockholdersEquity>
    <us-gaap:StockholdersEquity contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">15131065</us-gaap:StockholdersEquity>
    <us-gaap:StockholdersEquity contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">26704508</us-gaap:StockholdersEquity>
    <us-gaap:TreasuryStockValue contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">85188</us-gaap:TreasuryStockValue>
    <us-gaap:TreasuryStockValue contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">85188</us-gaap:TreasuryStockValue>
    <us-gaap:StockholdersEquityBeforeTreasuryStock contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">15216253</us-gaap:StockholdersEquityBeforeTreasuryStock>
    <us-gaap:StockholdersEquityBeforeTreasuryStock contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">26789696</us-gaap:StockholdersEquityBeforeTreasuryStock>
    <us-gaap:RetainedEarningsAccumulatedDeficit contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">-279145825</us-gaap:RetainedEarningsAccumulatedDeficit>
    <us-gaap:RetainedEarningsAccumulatedDeficit contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">-261781888</us-gaap:RetainedEarningsAccumulatedDeficit>
    <us-gaap:RetainedEarningsAccumulatedDeficit contextRef="AsOf2018-09-30_custom_NewJerseyMember_srt_MaximumMember" unitRef="USD" decimals="0">-12500000</us-gaap:RetainedEarningsAccumulatedDeficit>
    <us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">20960</us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax>
    <us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">-10164</us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax>
    <us-gaap:AdditionalPaidInCapitalCommonStock contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">294162004</us-gaap:AdditionalPaidInCapitalCommonStock>
    <us-gaap:AdditionalPaidInCapitalCommonStock contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">288408976</us-gaap:AdditionalPaidInCapitalCommonStock>
    <us-gaap:CommonStockValue contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">179114</us-gaap:CommonStockValue>
    <us-gaap:CommonStockValue contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">172772</us-gaap:CommonStockValue>
    <us-gaap:PreferredStockValue contextRef="AsOf2018-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:PreferredStockValue contextRef="AsOf2017-12-31" unitRef="USD" xsi:nil="true" />
    <us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">2929742</us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment>
    <us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">2838716</us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment>
    <us-gaap:PreferredStockParOrStatedValuePerShare contextRef="AsOf2018-09-30" unitRef="USDPShares" decimals="INF">0.01</us-gaap:PreferredStockParOrStatedValuePerShare>
    <us-gaap:PreferredStockParOrStatedValuePerShare contextRef="AsOf2017-12-31" unitRef="USDPShares" decimals="INF">0.01</us-gaap:PreferredStockParOrStatedValuePerShare>
    <us-gaap:PreferredStockSharesAuthorized contextRef="AsOf2018-09-30" unitRef="Shares" decimals="INF">100000</us-gaap:PreferredStockSharesAuthorized>
    <us-gaap:PreferredStockSharesAuthorized contextRef="AsOf2017-12-31" unitRef="Shares" decimals="INF">100000</us-gaap:PreferredStockSharesAuthorized>
    <us-gaap:PreferredStockSharesAuthorized contextRef="AsOf2016-09-30" unitRef="Shares" decimals="INF">100000</us-gaap:PreferredStockSharesAuthorized>
    <us-gaap:PreferredStockSharesIssued contextRef="AsOf2018-09-30" unitRef="Shares" xsi:nil="true" />
    <us-gaap:PreferredStockSharesIssued contextRef="AsOf2017-12-31" unitRef="Shares" xsi:nil="true" />
    <us-gaap:PreferredStockSharesOutstanding contextRef="AsOf2018-09-30" unitRef="Shares" xsi:nil="true" />
    <us-gaap:PreferredStockSharesOutstanding contextRef="AsOf2017-12-31" unitRef="Shares" xsi:nil="true" />
    <us-gaap:CommonStockParOrStatedValuePerShare contextRef="AsOf2018-09-30" unitRef="USDPShares" decimals="INF">0.01</us-gaap:CommonStockParOrStatedValuePerShare>
    <us-gaap:CommonStockParOrStatedValuePerShare contextRef="AsOf2017-12-31" unitRef="USDPShares" decimals="INF">0.01</us-gaap:CommonStockParOrStatedValuePerShare>
    <us-gaap:CommonStockParOrStatedValuePerShare contextRef="AsOf2017-10-27_custom_UnderwritingAgreementMember_custom_OppenheimerAndCoIncMember" unitRef="USDPShares" decimals="INF">0.01</us-gaap:CommonStockParOrStatedValuePerShare>
    <us-gaap:CommonStockSharesAuthorized contextRef="AsOf2018-09-30" unitRef="Shares" decimals="INF">112500000</us-gaap:CommonStockSharesAuthorized>
    <us-gaap:CommonStockSharesAuthorized contextRef="AsOf2017-12-31" unitRef="Shares" decimals="INF">112500000</us-gaap:CommonStockSharesAuthorized>
    <us-gaap:CommonStockSharesAuthorized contextRef="AsOf2016-09-30_srt_MinimumMember" unitRef="Shares" decimals="INF">75000000</us-gaap:CommonStockSharesAuthorized>
    <us-gaap:CommonStockSharesAuthorized contextRef="AsOf2016-09-30_srt_MaximumMember" unitRef="Shares" decimals="INF">112500000</us-gaap:CommonStockSharesAuthorized>
    <us-gaap:CommonStockSharesIssued contextRef="AsOf2018-09-30" unitRef="Shares" decimals="INF">17911154</us-gaap:CommonStockSharesIssued>
    <us-gaap:CommonStockSharesIssued contextRef="AsOf2017-12-31" unitRef="Shares" decimals="INF">17277299</us-gaap:CommonStockSharesIssued>
    <us-gaap:CommonStockSharesOutstanding contextRef="AsOf2018-09-30" unitRef="Shares" decimals="INF">17911120</us-gaap:CommonStockSharesOutstanding>
    <us-gaap:CommonStockSharesOutstanding contextRef="AsOf2017-12-31" unitRef="Shares" decimals="INF">17276965</us-gaap:CommonStockSharesOutstanding>
    <us-gaap:TreasuryStockShares contextRef="AsOf2018-09-30" unitRef="Shares" decimals="INF">334</us-gaap:TreasuryStockShares>
    <us-gaap:TreasuryStockShares contextRef="AsOf2017-12-31" unitRef="Shares" decimals="INF">334</us-gaap:TreasuryStockShares>
    <us-gaap:OperatingIncomeLoss contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">-16314677</us-gaap:OperatingIncomeLoss>
    <us-gaap:OperatingIncomeLoss contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">-13787236</us-gaap:OperatingIncomeLoss>
    <us-gaap:OperatingIncomeLoss contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">-4022220</us-gaap:OperatingIncomeLoss>
    <us-gaap:OperatingIncomeLoss contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">-4398097</us-gaap:OperatingIncomeLoss>
    <us-gaap:OperatingExpenses contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">16689677</us-gaap:OperatingExpenses>
    <us-gaap:OperatingExpenses contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">14162236</us-gaap:OperatingExpenses>
    <us-gaap:OperatingExpenses contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">4147220</us-gaap:OperatingExpenses>
    <us-gaap:OperatingExpenses contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">4523097</us-gaap:OperatingExpenses>
    <us-gaap:GeneralAndAdministrativeExpense contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">7167740</us-gaap:GeneralAndAdministrativeExpense>
    <us-gaap:GeneralAndAdministrativeExpense contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">4291482</us-gaap:GeneralAndAdministrativeExpense>
    <us-gaap:GeneralAndAdministrativeExpense contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">1959903</us-gaap:GeneralAndAdministrativeExpense>
    <us-gaap:GeneralAndAdministrativeExpense contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">1174250</us-gaap:GeneralAndAdministrativeExpense>
    <us-gaap:ResearchAndDevelopmentExpense contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">9521937</us-gaap:ResearchAndDevelopmentExpense>
    <us-gaap:ResearchAndDevelopmentExpense contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">9870754</us-gaap:ResearchAndDevelopmentExpense>
    <us-gaap:ResearchAndDevelopmentExpense contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">2187317</us-gaap:ResearchAndDevelopmentExpense>
    <us-gaap:ResearchAndDevelopmentExpense contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">3348847</us-gaap:ResearchAndDevelopmentExpense>
    <us-gaap:NonoperatingIncomeExpense contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">-1049260</us-gaap:NonoperatingIncomeExpense>
    <us-gaap:NonoperatingIncomeExpense contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">-1934098</us-gaap:NonoperatingIncomeExpense>
    <us-gaap:NonoperatingIncomeExpense contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">-634166</us-gaap:NonoperatingIncomeExpense>
    <us-gaap:NonoperatingIncomeExpense contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">-1273232</us-gaap:NonoperatingIncomeExpense>
    <us-gaap:OtherNonoperatingIncomeExpense contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">78</us-gaap:OtherNonoperatingIncomeExpense>
    <us-gaap:OtherNonoperatingIncomeExpense contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">3545</us-gaap:OtherNonoperatingIncomeExpense>
    <us-gaap:OtherNonoperatingIncomeExpense contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">2</us-gaap:OtherNonoperatingIncomeExpense>
    <us-gaap:OtherNonoperatingIncomeExpense contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">93</us-gaap:OtherNonoperatingIncomeExpense>
    <us-gaap:InvestmentIncomeNonoperating contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">253750</us-gaap:InvestmentIncomeNonoperating>
    <us-gaap:InvestmentIncomeNonoperating contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">3941</us-gaap:InvestmentIncomeNonoperating>
    <us-gaap:InvestmentIncomeNonoperating contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">106565</us-gaap:InvestmentIncomeNonoperating>
    <us-gaap:InvestmentIncomeNonoperating contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">524</us-gaap:InvestmentIncomeNonoperating>
    <CLSN:GainLossFromValuationOfEarnoutMilestoneLiability contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">3567671</CLSN:GainLossFromValuationOfEarnoutMilestoneLiability>
    <CLSN:GainLossFromValuationOfEarnoutMilestoneLiability contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">670172</CLSN:GainLossFromValuationOfEarnoutMilestoneLiability>
    <CLSN:GainLossFromValuationOfEarnoutMilestoneLiability contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">4114995</CLSN:GainLossFromValuationOfEarnoutMilestoneLiability>
    <CLSN:GainLossFromValuationOfEarnoutMilestoneLiability contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">1246151</CLSN:GainLossFromValuationOfEarnoutMilestoneLiability>
    <us-gaap:EarningsPerShareBasicAndDiluted contextRef="From2018-01-01to2018-09-30" unitRef="USDPShares" decimals="INF">-1.00</us-gaap:EarningsPerShareBasicAndDiluted>
    <us-gaap:EarningsPerShareBasicAndDiluted contextRef="From2017-01-01to2017-09-30" unitRef="USDPShares" decimals="INF">-3.04</us-gaap:EarningsPerShareBasicAndDiluted>
    <us-gaap:EarningsPerShareBasicAndDiluted contextRef="From2018-07-01to2018-09-30" unitRef="USDPShares" decimals="INF">-0.26</us-gaap:EarningsPerShareBasicAndDiluted>
    <us-gaap:EarningsPerShareBasicAndDiluted contextRef="From2017-04-01to2017-06-30" unitRef="USDPShares" decimals="INF">-0.70</us-gaap:EarningsPerShareBasicAndDiluted>
    <us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted contextRef="From2018-01-01to2018-09-30" unitRef="Shares" decimals="INF">17447921</us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted>
    <us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted contextRef="From2017-01-01to2017-09-30" unitRef="Shares" decimals="INF">5171699</us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted>
    <us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted contextRef="From2018-07-01to2018-09-30" unitRef="Shares" decimals="INF">17801230</us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted>
    <us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted contextRef="From2017-04-01to2017-06-30" unitRef="Shares" decimals="INF">8054658</us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted>
    <us-gaap:InterestAndDebtExpense contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">360759</us-gaap:InterestAndDebtExpense>
    <us-gaap:InterestAndDebtExpense contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">91756</us-gaap:InterestAndDebtExpense>
    <us-gaap:InterestAndDebtExpense contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">345728</us-gaap:InterestAndDebtExpense>
    <us-gaap:InterestAndDebtExpense contextRef="From2017-04-01to2017-06-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:ComprehensiveIncomeNetOfTax contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">-17332813</us-gaap:ComprehensiveIncomeNetOfTax>
    <us-gaap:ComprehensiveIncomeNetOfTax contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">-15721334</us-gaap:ComprehensiveIncomeNetOfTax>
    <us-gaap:ComprehensiveIncomeNetOfTax contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">-4629509</us-gaap:ComprehensiveIncomeNetOfTax>
    <us-gaap:ComprehensiveIncomeNetOfTax contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">-5671329</us-gaap:ComprehensiveIncomeNetOfTax>
    <us-gaap:NetIncomeLoss contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">-17363937</us-gaap:NetIncomeLoss>
    <us-gaap:NetIncomeLoss contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">-15721334</us-gaap:NetIncomeLoss>
    <us-gaap:NetIncomeLoss contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">-4656386</us-gaap:NetIncomeLoss>
    <us-gaap:NetIncomeLoss contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">-5671329</us-gaap:NetIncomeLoss>
    <us-gaap:NetCashProvidedByUsedInOperatingActivities contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">-13077971</us-gaap:NetCashProvidedByUsedInOperatingActivities>
    <us-gaap:NetCashProvidedByUsedInOperatingActivities contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">-12433179</us-gaap:NetCashProvidedByUsedInOperatingActivities>
    <us-gaap:IncreaseDecreaseInAccountsPayable contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">-399935</us-gaap:IncreaseDecreaseInAccountsPayable>
    <us-gaap:IncreaseDecreaseInAccountsPayable contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">134440</us-gaap:IncreaseDecreaseInAccountsPayable>
    <us-gaap:IncreaseDecreaseInDeferredLiabilities contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">-6009</us-gaap:IncreaseDecreaseInDeferredLiabilities>
    <us-gaap:IncreaseDecreaseInDeferredLiabilities contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">61328</us-gaap:IncreaseDecreaseInDeferredLiabilities>
    <CLSN:DeferredFinanceCharges contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">101695</CLSN:DeferredFinanceCharges>
    <CLSN:DeferredFinanceCharges contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">35370</CLSN:DeferredFinanceCharges>
    <us-gaap:IssuanceOfStockAndWarrantsForServicesOrClaims contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">29841</us-gaap:IssuanceOfStockAndWarrantsForServicesOrClaims>
    <us-gaap:IssuanceOfStockAndWarrantsForServicesOrClaims contextRef="From2017-01-01to2017-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:ShareBasedCompensation contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">3985829</us-gaap:ShareBasedCompensation>
    <us-gaap:ShareBasedCompensation contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">951488</us-gaap:ShareBasedCompensation>
    <us-gaap:IncreaseDecreaseInDeferredRevenue contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">-375000</us-gaap:IncreaseDecreaseInDeferredRevenue>
    <us-gaap:IncreaseDecreaseInDeferredRevenue contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">-375000</us-gaap:IncreaseDecreaseInDeferredRevenue>
    <us-gaap:DepreciationDepletionAndAmortization contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">261513</us-gaap:DepreciationDepletionAndAmortization>
    <us-gaap:DepreciationDepletionAndAmortization contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">511587</us-gaap:DepreciationDepletionAndAmortization>
    <us-gaap:NetCashProvidedByUsedInInvestingActivities contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">-5956365</us-gaap:NetCashProvidedByUsedInInvestingActivities>
    <us-gaap:NetCashProvidedByUsedInInvestingActivities contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">1758874</us-gaap:NetCashProvidedByUsedInInvestingActivities>
    <us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">9750000</us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities>
    <us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">1680000</us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities>
    <us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">-8072752</us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease>
    <us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">60848</us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease>
    <us-gaap:NetCashProvidedByUsedInFinancingActivities contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">10961584</us-gaap:NetCashProvidedByUsedInFinancingActivities>
    <us-gaap:NetCashProvidedByUsedInFinancingActivities contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">10735153</us-gaap:NetCashProvidedByUsedInFinancingActivities>
    <us-gaap:ProceedsFromWarrantExercises contextRef="From2018-01-01to2018-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:ProceedsFromWarrantExercises contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">4925886</us-gaap:ProceedsFromWarrantExercises>
    <us-gaap:ProceedsFromWarrantExercises contextRef="d_2017-01-01_2017-12-31_ClassOfWarrantOrRightAxis-SeriesAAWarrantMember_SubsidiarySaleOfStockAxis-February142017PublicOfferingMember" unitRef="USD" decimals="0">2400000</us-gaap:ProceedsFromWarrantExercises>
    <us-gaap:ProceedsFromWarrantExercises contextRef="From2017-06-08to2017-06-09_custom_TwoThousandThirteenWarrants2014WarrantsAndJune2016WarrantsMember" unitRef="USD" decimals="0">2100000</us-gaap:ProceedsFromWarrantExercises>
    <us-gaap:ProceedsFromWarrantExercises contextRef="From2015-05-26to2015-05-27_custom_TwoThousandFifteenWarrantsMember" unitRef="USD" decimals="0">800000</us-gaap:ProceedsFromWarrantExercises>
    <us-gaap:ProceedsFromWarrantExercises contextRef="From2015-05-26to2015-05-27_custom_JuneTwoThousandAndSixrteenWarrantsMember" unitRef="USD" decimals="0">800000</us-gaap:ProceedsFromWarrantExercises>
    <us-gaap:ProceedsFromIssuanceOfRedeemableConvertiblePreferredStock contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">1236584</us-gaap:ProceedsFromIssuanceOfRedeemableConvertiblePreferredStock>
    <us-gaap:ProceedsFromIssuanceOfRedeemableConvertiblePreferredStock contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">8405190</us-gaap:ProceedsFromIssuanceOfRedeemableConvertiblePreferredStock>
    <us-gaap:CashAndCashEquivalentsAtCarryingValue contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">3371303</us-gaap:CashAndCashEquivalentsAtCarryingValue>
    <us-gaap:CashAndCashEquivalentsAtCarryingValue contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">11444055</us-gaap:CashAndCashEquivalentsAtCarryingValue>
    <us-gaap:CashAndCashEquivalentsAtCarryingValue contextRef="AsOf2016-12-31" unitRef="USD" decimals="0">2624162</us-gaap:CashAndCashEquivalentsAtCarryingValue>
    <us-gaap:CashAndCashEquivalentsAtCarryingValue contextRef="AsOf2017-09-30" unitRef="USD" decimals="0">2685010</us-gaap:CashAndCashEquivalentsAtCarryingValue>
    <us-gaap:InterestPaidNet contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">259064</us-gaap:InterestPaidNet>
    <us-gaap:InterestPaidNet contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">56386</us-gaap:InterestPaidNet>
    <us-gaap:IncreaseDecreaseInDepositOtherAssets contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">22306</us-gaap:IncreaseDecreaseInDepositOtherAssets>
    <us-gaap:IncreaseDecreaseInDepositOtherAssets contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">-4008</us-gaap:IncreaseDecreaseInDepositOtherAssets>
    <us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">231991</us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets>
    <us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">-115106</us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets>
    <us-gaap:PaymentsToAcquireAvailableForSaleSecurities contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">15574587</us-gaap:PaymentsToAcquireAvailableForSaleSecurities>
    <us-gaap:PaymentsToAcquireAvailableForSaleSecurities contextRef="From2017-01-01to2017-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:PaymentsToAcquirePropertyPlantAndEquipment contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">81778</us-gaap:PaymentsToAcquirePropertyPlantAndEquipment>
    <us-gaap:PaymentsToAcquirePropertyPlantAndEquipment contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">21126</us-gaap:PaymentsToAcquirePropertyPlantAndEquipment>
    <us-gaap:RepaymentsOfNotesPayable contextRef="From2018-01-01to2018-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:RepaymentsOfNotesPayable contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">2595923</us-gaap:RepaymentsOfNotesPayable>
    <us-gaap:NatureOfOperations contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 1. Business Description&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Celsion Corporation, a Delaware corporation&#13;based in Lawrenceville, New Jersey, and its wholly owned subsidiary, CLSN Laboratories, Inc., also a Delaware corporation, referred&#13;to herein as &amp;#8220;Celsion&amp;#8221;, &amp;#8220;we&amp;#8221;, or &amp;#8220;the Company,&amp;#8221; as the context requires, is a fully-integrated,&#13;development stage oncology drug company focused on developing a portfolio of innovative cancer treatments, including directed&#13;chemotherapies, immunotherapies and RNA- or DNA-based therapies. Our lead program is ThermoDox&amp;#174;, a proprietary heat-activated&#13;liposomal encapsulation of doxorubicin, currently in Phase III development for the treatment of primary liver cancer. Our product&#13;pipeline also includes GEN-1, a DNA-based immunotherapy for the localized treatment of ovarian and brain cancers. Our product&#13;pipeline is based on three platform technologies that have demonstrated the potential to address a broad range of solid tumor&#13;cancer indications including novel nucleic acid-based immunotherapies, anti-cancer DNA or RNA therapies, and heat sensitive liposomal&#13;formulations of known chemotherapeutics. With these technologies we are working to develop and commercialize efficient, effective&#13;and targeted therapeutics that minimize the side-effects common to cancer treatments.&lt;/p&gt;</us-gaap:NatureOfOperations>
    <us-gaap:BasisOfAccounting contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 2. Basis of Presentation&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;&amp;#160;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The accompanying unaudited condensed&#13;consolidated financial statements, which include the accounts of Celsion Corporation and its wholly owned subsidiary CLSN Laboratories,&#13;Inc, have been prepared in accordance with generally accepted accounting principles in the United States (GAAP) for interim financial&#13;information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. All intercompany balances and transactions&#13;have been eliminated. Certain information and disclosures normally included in financial statements prepared in accordance with&#13;GAAP have been condensed or omitted pursuant to such rules and regulations.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In the opinion of management, all adjustments,&#13;consisting only of normal recurring accruals considered necessary for a fair presentation, have been included in the accompanying&#13;unaudited condensed consolidated financial statements. Operating results for the three and nine-month periods ended September 30,&#13;2018 are not necessarily indicative of the results that may be expected for any other interim period(s) or for any full year. For&#13;further information, refer to the financial statements and notes thereto included in the Company&amp;#8217;s Annual Report on Form&#13;10-K for the fiscal year ended December 31, 2017 filed with the Securities and Exchange Commission (SEC) on March 27, 2018.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The preparation of financial statements&#13;in conformity with GAAP requires management to make judgments, estimates, and assumptions that affect the amount reported in the&#13;Company&amp;#8217;s financial statements and accompanying notes. Actual results could differ materially from those estimates. Events&#13;and conditions arising subsequent to the most recent balance sheet date have been evaluated for their possible impact on the financial&#13;statements and accompanying notes. No events and conditions would give rise to any information that required accounting recognition&#13;or disclosure in the financial statements other than those arising in the ordinary course of business.&lt;/p&gt;</us-gaap:BasisOfAccounting>
    <us-gaap:SubstantialDoubtAboutGoingConcernTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 3. Financial Condition and Business&#13;Plan&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Since inception, the Company has incurred substantial&#13;operating losses, principally from expenses associated with the Company&amp;#8217;s research and development programs, clinical trials&#13;conducted in connection with the Company&amp;#8217;s product candidates, and applications and submissions to the U.S. Food and Drug&#13;Administration. We have not generated significant revenue and have incurred significant net losses in each year since our inception.&#13;We have incurred approximately $279 million of cumulated net losses. As of September 30, 2018, we had approximately $22.0 million&#13;in cash, investment securities and interest receivable. We have substantial future capital requirements to continue our research&#13;and development activities and advance our product candidates through various development stages. The Company believes these expenditures&#13;are essential for the commercialization of its technologies.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The Company expects its operating losses to&#13;continue for the foreseeable future as it continues its product development efforts, and when it undertakes marketing and sales&#13;activities. The Company&amp;#8217;s ability to achieve profitability is dependent upon its ability to obtain governmental approvals,&#13;manufacture, and market and sell its new product candidates. There can be no assurance that the Company will be able to commercialize&#13;its technology successfully or that profitability will ever be achieved. The operating results of the Company have fluctuated significantly&#13;in the past. We have substantial future capital requirements associated with our continued research and development activities&#13;and to advance our product candidates through various stages of development. The Company believes these expenditures are essential&#13;for the commercialization of its technologies.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The actual amount of funds the Company will&#13;need to operate is subject to many factors, some of which are beyond the Company&amp;#8217;s control. These factors include the following:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="width: 10px"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 48px"&gt;&lt;font style="font-size: 10pt"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&lt;font style="font-size: 10pt"&gt;the progress of research activities;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 10pt"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&lt;font style="font-size: 10pt"&gt;the number and scope of research programs;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 10pt"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&lt;font style="font-size: 10pt"&gt;the progress of preclinical and clinical development activities;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 10pt"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&lt;font style="font-size: 10pt"&gt;the progress of the development efforts of parties with whom the Company has entered into research and development agreements;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 10pt"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&lt;font style="font-size: 10pt"&gt;the costs associated with additional clinical trials of product candidates;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 10pt"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&lt;font style="font-size: 10pt"&gt;the ability to maintain current research and development licensing arrangements and to establish new research and development and licensing arrangements;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 10pt"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&lt;font style="font-size: 10pt"&gt;the ability to achieve milestones under licensing arrangements;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 10pt"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&lt;font style="font-size: 10pt"&gt;the costs involved in prosecuting and enforcing patent claims and other intellectual property rights; and&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&lt;font style="font-size: 10pt"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify"&gt;&lt;font style="font-size: 10pt"&gt;the costs and timing of regulatory approvals.&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The Company has based its estimate on assumptions&#13;that may prove to be wrong. The Company may need to obtain additional funds sooner or in greater amounts than it currently anticipates.&#13;Potential sources of financing include strategic relationships, public or private sales of the Company&amp;#8217;s shares or debt,&#13;the sale of its State of New Jersey net operating losses and other sources. If the Company raises funds by selling additional shares&#13;of common stock or other securities convertible into common stock, the ownership interest of existing stockholders may be diluted.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Annually, the State of New Jersey enables approved&#13;technology and biotechnology businesses with New Jersey net operating tax losses the opportunity to sell these losses through the&#13;Technology Business Tax Certificate Program (the &amp;#8220;NOL Program&amp;#8221;), thereby providing cash to companies to help fund their&#13;operations. The Company determined it met the eligibility requirements of the NOL Program for 2018 and filed its application with&#13;the New Jersey Economic Development Authority (NJEDA) in June 2018. In this application, the Company requested authorization of&#13;up to $12.5 million in cumulative New Jersey net operating losses to be eligible for sale. In September 2018, the NJEDA notified&#13;the Company that its application received approval under the NOL Program for 2018. The Company expects that the successful transfer&#13;of these credits will result in receipt of approximately $10 million in net cash proceeds to the Company prior to the end of 2018.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;With $22.0 million in cash, investment securities&#13;and interest receivable at September 30, 2018 and the impending sale of its New Jersey NOLs, the Company believes it has sufficient&#13;capital resources to fund its operations into the fourth quarter of 2020. The Company will be required to obtain additional funding&#13;in order to continue the development of its current product candidates within the anticipated time periods, if at all, and to&#13;continue to fund operations. As more fully discussed in Note 11, the Company has $15.0 million available for future sale of equity&#13;securities under a common stock purchase agreement with Aspire Capital Fund, LLC.&lt;/p&gt;</us-gaap:SubstantialDoubtAboutGoingConcernTextBlock>
    <us-gaap:DescriptionOfNewAccountingPronouncementsNotYetAdopted contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&lt;b&gt;Note 4. New Accounting Pronouncements&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;From time to time, new accounting pronouncements&#13;are issued by Financial Accounting Standards Board (FASB) and are adopted by us as of the specified effective date. Unless otherwise&#13;discussed, we believe that the impact of recently issued accounting pronouncements will not have a material impact on the Company&amp;#8217;s&#13;consolidated financial position, results of operations, and cash flows, or do not apply to our operations.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In May 2014, the FASB issued Accounting&#13;Standards Update (ASU) No. 2014-09 &amp;#8220;Revenue from Contracts with Customers (Topic 606),&amp;#8221; which supersedes all existing&#13;revenue recognition requirements, including most industry-specific guidance. The new standard requires a company to recognize revenue&#13;when it transfers goods or services to customers in an amount that reflects the consideration that the company expects to receive&#13;for those goods or services. ASU 2014 - 09 was originally going to be effective on January 1, 2017; however, the FASB issued ASU&#13;2015-14, &amp;#8220;Revenue from Contracts with Customers (Topic 606) - Deferral of the Effective Date,&amp;#8221; which deferred the effective&#13;date of ASU 2014-09 by one year to January 1, 2018. In March 2016, the FASB issued ASU No. 2016 - 8, &amp;#8220;Revenue from Contracts&#13;with Customers (Topic 606): Principal versus Agent Considerations. The amendments in this ASU do not change the core principle&#13;of ASU No. 2014 - 09 but the amendments clarify the implementation guidance on reporting revenue gross versus net. The effective&#13;date for the amendments in this ASU is the same as the effective date of ASU No. 2014-09. In April 2016, the FASB issued ASU No.&#13;2016-10, &amp;#8220;Revenue from Contracts with Customers (Identifying Performance Obligations and Licensing),&amp;#8221; to clarify the&#13;implementation guidance on identifying performance obligations and licensing (collectively &amp;#8220;the new revenue standards&amp;#8221;).&#13;The new revenue standards allow for either &amp;#8220;full retrospective&amp;#8221; adoption, meaning the standard is applied to all periods&#13;presented, or &amp;#8220;modified retrospective&amp;#8221; adoption, meaning the standard is applied only to the most current period presented&#13;in the financial statements. The new revenue standard became effective for us on January 1, 2018. Under the new revenue standards,&#13;we recognize revenue following a five-step model prescribed under ASU No. 2014-09; (i) identify contract(s) with a customer; (ii)&#13;identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price&#13;to the performance obligations in the contract; and (v) recognize revenues when (or as) we satisfy the performance obligation.&#13;As further described in Note 15, the Company currently has only one contract subject to the new revenue standards. After performance&#13;of the five-step model discussed above, the Company concluded the adoption of the new revenue standards as of January 1, 2018 did&#13;not change our revenue recognition policy nor does it have an effect on our financial statements using either the full retrospective&#13;or the modified retrospective adoption methods.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In January 2016, the FASB issued Accounting&#13;Standards Update No. 2016-01, &amp;#8220;Recognition and Measurement of Financial Assets and Financial Liabilities,&amp;#8221; which requires&#13;that most equity investments be measured at fair value, with subsequent changes in fair value recognized in net income (other than&#13;those accounted for under the equity method of accounting). This guidance is effective for fiscal years, and interim periods within&#13;those years, beginning after December 15, 2017. Based on the Company&amp;#8217;s evaluation, the adoption of the ASU 2016-01 does not&#13;have a material impact on its consolidated financial statements or its disclosures.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In February 2016, the FASB issued Accounting&#13;Standards Update No. 2016-02, &amp;#8220;Leases&amp;#8221; (Topic 842), which requires that lessees recognize assets and liabilities for&#13;leases with lease terms greater than twelve months in the statement of financial position. Leases will be classified as either&#13;finance or operating, with classification affecting the pattern of expense recognition in the income statement. This update also&#13;requires improved disclosures to help users of financial statements better understand the amount, timing and uncertainty of cash&#13;flows arising from leases. The update is effective for fiscal years beginning after December 15, 2018, including interim reporting&#13;periods within that reporting period. Early adoption is permitted. We are evaluating the impact of ASU 2016-2, which we plan to&#13;adopt on January 1, 2019, on our consolidated financial statements. To date, we have identified all of our leases which consist&#13;of the New Jersey corporate office lease and the Alabama lab facility lease, and we anticipate that adoption of ASU 2016-2 will&#13;result in the recognition of additional assets and lease liabilities, along with the associated recognition of amortization expense&#13;for the right-to-use assets.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In August 2016, the FASB issued Accounting&#13;Standard Update No. 2016-15, &amp;#8220;Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments.&amp;#8221;&#13;This update clarifies how certain cash receipts and payments should be presented in the statement of cash flows and is effective&#13;for interim and annual reporting periods beginning after December 15, 2017, with early adoption permitted. Based on the Company&amp;#8217;s&#13;evaluation, the adoption of the ASU 2016-01 did not have a material impact on its consolidated financial statements or its disclosures.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In November 2016, the FASB issued Accounting&#13;Standard Update No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. This update amends the guidance in ASC 230,&#13;including providing additional guidance related to transfers between cash and restricted cash and how entities present, in their&#13;statement of cash flows, the cash receipts and cash payments that directly affect the restricted cash accounts. This guidance is&#13;effective for annual reporting periods beginning after December 15, 2017, and interim periods within those years, with early adoption&#13;permitted. Based on the Company&amp;#8217;s evaluation, the adoption of the ASU 2016 - 01 did not have a material impact on its consolidated&#13;financial statements or its disclosures.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In January 2017, the FASB issued Accounting&#13;Standard Update No. 2017-01, &amp;#8220;Business Combinations (Topic 805): Clarifying the Definition of a Business,&amp;#8221; which clarifies&#13;the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should&#13;be accounted for as acquisitions (or disposals) of assets or businesses. This guidance is effective for annual reporting periods&#13;beginning after December 15, 2018, and interim periods within those years, with early adoption permitted. The Company does not&#13;believe the adoption of ASU 2017-01 will have an impact on our financial statement or disclosures.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In January 2017, the FASB issued Accounting&#13;Standard Update &lt;i&gt;No. 2017&lt;/i&gt;-&lt;i&gt;04,&lt;/i&gt; &amp;#8220;Intangibles-Goodwill and Other, Simplifying the Test for Goodwill Impairment,&amp;#8221;&#13;which eliminated Step &lt;i&gt;2&lt;/i&gt; from the goodwill impairment test. Under the revised test, an entity should perform its annual,&#13;or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should&#13;recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit&amp;#8217;s fair value; however,&#13;the loss recognized should &lt;i&gt;not&lt;/i&gt; exceed the total amount of goodwill allocated to that reporting unit. This ASU is effective&#13;for any interim or annual impairment tests for fiscal years beginning after December 15, 2019, with early adoption permitted.&#13;The Company adopted this method for its impairment testing of goodwill during 2017 and 2018. Based on the Company&amp;#8217;s evaluation,&#13;the adoption of the ASU 2017-04 did not have any material impact on its consolidated financial statements or its disclosures.&lt;/p&gt;</us-gaap:DescriptionOfNewAccountingPronouncementsNotYetAdopted>
    <us-gaap:EarningsPerShareTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 5. Net Loss per Common Share&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Basic loss per share is calculated based&#13;upon the net loss available to common shareholders divided by the weighted average number of common shares outstanding during the&#13;period. Diluted loss per share is calculated after adjusting the denominator of the basic earnings per share computation for the&#13;effects of all dilutive potential common shares outstanding during the period. The dilutive effects of preferred stock, options&#13;and warrants and their equivalents are computed using the treasury stock method.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The total number of shares of common&#13;stock issuable upon exercise of warrants, stock option grants and equity awards were 6,496,261 and 6,208,389 shares for the three&#13;and nine-month periods ended September 30, 2018 and 2017, respectively. For the three and nine month periods ended September 30,&#13;2018 and 2017, diluted loss per common share was the same as basic loss per common share as all options and all warrants that&#13;were exercisable into shares of the Company&amp;#8217;s common stock were excluded from the calculation of diluted earnings attributable&#13;to common shareholders per common share as their effect would have been anti-dilutive.&lt;/p&gt;</us-gaap:EarningsPerShareTextBlock>
    <us-gaap:DerivativesAndFairValueTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 6. Fair Value of Financial Instruments&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Short-term investments available for&#13;sale of $18,579,731 and $12,724,020 as of September 30, 2018 and December 31, 2017, respectively, consist of money market funds,&#13;commercial paper, corporate debt securities, and government agency debt securities. These investments are valued at estimated fair&#13;value, with unrealized gains and losses reported as a separate component of stockholders&amp;#8217; equity in accumulated other comprehensive&#13;loss.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Securities available for sale are evaluated&#13;periodically to determine whether a decline in their value is other than temporary. The term &amp;#8220;other than temporary&amp;#8221;&#13;is not intended to indicate a permanent decline in value. Rather, it means that the prospects for near term recovery of value are&#13;not necessarily favorable, or that there is a lack of evidence to support fair values equal to, or greater than, the carrying value&#13;of the security. Management reviews criteria such as the magnitude and duration of the decline, as well as the reasons for the&#13;decline, to predict whether the loss in value is other than temporary. Once a decline in value is determined to be other than temporary,&#13;the value of the security is reduced and a corresponding charge to earnings is recognized.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;A summary of the cost, fair value and&#13;maturities of the Company&amp;#8217;s short-term investments is as follows:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;September 30, 2018&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;December 31, 2017&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Cost&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Cost&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Short-term investments&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="width: 48%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Certificate of deposit&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;3,128,390&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;3,144,875&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Corporate debt securities&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;15,430,381&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;15,434,856&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,734,184&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,724,020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;18,558,771&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;18,579,731&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,734,184&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,724,020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;September 30, 2018&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;December 31, 2017&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Cost&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Cost&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Short-term investment maturities&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="width: 48%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Within 3 months&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;5,714,421&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;5,724,554&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Between 3-12 months&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,844,350&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,855,177&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,734,184&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,724,020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;18,558,771&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;18,579,731&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,734,184&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,724,020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The following table shows the Company&amp;#8217;s&#13;investment securities gross unrealized gains (losses) and fair value by investment category and length of time that individual&#13;securities have been in a continuous unrealized loss position at September 30, 2018 and December 31, 2017. The Company has reviewed&#13;individual securities to determine whether a decline in fair value below the amortizable cost basis is other than temporary.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;September 30, 2018&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;December 31, 2017&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Available for sale securities&lt;/b&gt; (all unrealized holding gains and losses are less than 12 months at date of measurement)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Unrealized&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Holding&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Gains&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;(Losses)&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Unrealized&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Holding&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Gains&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;(Losses)&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 48%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Investments with unrealized gains&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;10,845,595&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;27,352&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;748,148&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;570&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Investments with unrealized losses&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;7,734,136&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(6,392&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;11,975,872&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(10,734&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;18,579,731&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;20,960&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,724,020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(10,164&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Investment income, which includes net&#13;realized losses on sales of available for sale securities and investment income interest and dividends, is summarized as follows:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Three Months Ended&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;September 30,&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2018&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2017&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 62%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Interest and dividends accrued and paid&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 16%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;103,777&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 16%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;524&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Realized gains&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2,788&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Investment income, net&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;106,565&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;524&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Nine Months Ended&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;September 30,&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2018&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2017&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 62%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Interest and dividends accrued and paid&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 16%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;242,625&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 16%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;3,941&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Realized gains&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;11,125&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Investment income, net&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;253,750&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;3,941&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</us-gaap:DerivativesAndFairValueTextBlock>
    <us-gaap:FairValueDisclosuresTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 7. Fair Value Measurements&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;&amp;#160;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;FASB Accounting Standards Codification&#13;(ASC) Section 820 &amp;#8220;Fair Value Measurements and Disclosures,&amp;#8221; establishes a three-level hierarchy for fair value measurements&#13;which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair&#13;value. The three levels of inputs that may be used to measure fair value are as follows:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 27.5pt; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 27.5pt; text-align: justify"&gt;Level 1: Quoted prices (unadjusted)&#13;or identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 27.5pt; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 27.5pt; text-align: justify"&gt;Level 2: Significant other&#13;observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that&#13;are not active; or other inputs that are observable or can be corroborated by observable market data; and&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 27.5pt; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 27.5pt; text-align: justify"&gt;Level 3: Significant unobservable&#13;inputs that reflect a reporting entity&amp;#8217;s own assumptions that market participants would use in pricing an asset or liability.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The fair values of securities available&#13;for sale are determined by obtaining quoted prices on nationally recognized exchanges (Level 1 inputs) or matrix pricing, which&#13;is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for&#13;the specific securities but rather by relying on the securities&amp;#8217; relationship to other benchmark quoted securities (Level&#13;2 inputs).&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Cash and cash equivalents, other current&#13;assets, accounts payable and other accrued liabilities are reflected in the condensed consolidated balance sheet at their approximate&#13;estimated fair values primarily due to their short-term nature. There were no transfers of assets or liabilities between Level&#13;1 and Level 2 and no transfers in or out of Level 3 during the nine months ended September 30, 2018 or 2017. All changes in Level&#13;3 liabilities were the result of changes in the fair value of the earn-out milestone liability included in earnings (see Note 13).&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Assets and liabilities measured at fair&#13;value are summarized below:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Total Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Quoted Prices&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;In Active Markets&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;For Identical Assets/Liabilities (Level&#13;        1)&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Significant Other Observable Inputs&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;(Level 2)&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Significant Unobservable Inputs&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;(Level 3)&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Assets:&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Recurring items as of September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="width: 48%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Investment securities, available for sale&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;18,579,731&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;18,579,731&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Recurring items as of December 31, 2017&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Investment securities, available for sale&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,724,020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,724,020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Liabilities:&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Recurring items as of September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Earn-out milestone liability (Note 13)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;8,970,854&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;8,970,854&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Recurring items as of December 31, 2017&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Earn-out milestone liability (Note 13)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,538,525&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,538,525&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</us-gaap:FairValueDisclosuresTextBlock>
    <us-gaap:BusinessCombinationDisclosureTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 8. Acquisition of EGEN Assets&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On June 20, 2014, we completed the acquisition&#13;of substantially all of the assets of EGEN, Inc., an Alabama corporation, which has changed its company name to EGWU, Inc. after&#13;the closing of the acquisition (&amp;#8220;EGEN&amp;#8221;), pursuant to an Asset Purchase Agreement dated as of June 6, 2014, by and between&#13;EGEN and Celsion (the &amp;#8220;Asset Purchase Agreement&amp;#8221;). We acquired all of EGEN&amp;#8217;s right, title and interest in and&#13;to substantially all of the assets of EGEN, including cash and cash equivalents, patents, trademarks and other intellectual property&#13;rights, clinical data, certain contracts, licenses and permits, equipment, furniture, office equipment, furnishings, supplies and&#13;other tangible personal property. In addition, CLSN Laboratories assumed certain specified liabilities of EGEN, including the liabilities&#13;arising out of the acquired contracts and other assets relating to periods after the closing date.&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The total purchase price for the asset&#13;acquisition is up to $44.4 million, including potential future earnout payments of up to $30.4 million contingent upon achievement&#13;of certain earnout milestones set forth in the Asset Purchase Agreement. At the closing, we paid approximately $3.0 million in&#13;cash after the expense adjustment and issued 193,728 shares of our common stock to EGEN. The shares of common stock were issued&#13;in a private transaction exempt from registration under the Securities Act, pursuant to Section 4 (2) thereof. In addition, 47,862&#13;shares of common stock were held back by us at the closing and are issuable to EGEN pending satisfactory resolution of any post-closing&#13;adjustments for expenses or in relation to EGEN&amp;#8217;s indemnification obligations under the Asset Purchase Agreement (the &amp;#8220;Holdback&#13;Shares&amp;#8221;). These shares were issued to EGEN on June 16, 2017.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 7.7pt; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;After its review in 2017, management&#13;concluded that there was no immediate opportunity to out-license TheraSilence. Because of this analysis, the earnout payments were&#13;adjusted prior to 2017. In conjunction with its review, management determined the earnout payments may be up to $24.4 million that&#13;may become payable, in cash, shares of our common stock or a combination thereof, at our option, upon achievement of the remaining&#13;two major milestone events as follows:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 9.9pt; text-align: justify; text-indent: 31.9pt"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 2%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 97%; text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$12.4 million will become payable upon achieving certain specified development milestones relating to an ovarian cancer study of GEN-1 (formerly known as EGEN-001) to be conducted by us or our subsidiary; and&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$12.0 million will become payable upon achieving certain specified development milestones relating to a GEN-1 glioblastoma multiforme brain cancer study to be conducted by us or our subsidiary.&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 7.7pt; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The following table summarizes the fair&#13;values of these assets acquired and liabilities assumed related to the acquisition.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 82%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Property and equipment, net&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 15%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;35,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;In-process research and development&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;24,211,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Other Intangible assets (Covenant not to compete)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1,591,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Goodwill&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1,976,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Total assets:&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;27,813,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Accounts payable and accrued liabilities&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(235,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Net assets acquired&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;27,578,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Acquired in-process research and development&#13;(IPR&amp;#38;D) consists of EGEN&amp;#8217;s drug technology platforms: TheraPlas and TheraSilence. The fair value of the IPR&amp;#38;D drug&#13;technology platforms was estimated to be $24.2 million as of the acquisition date. As of the closing of the acquisition, the IPR&amp;#38;D&#13;was considered indefinite lived intangible assets and will not be amortized. IPR&amp;#38;D is reviewed for impairment at least annually&#13;as of our third quarter ended September 30, and whenever events or changes in circumstances indicate that the carrying value of&#13;the assets might not be recoverable.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;At December 31, 2016, the Company determined&#13;one of the IPR&amp;#38;D assets related to the development of its RNA delivery system being developed with collaborators using their&#13;RNA product candidates may be impaired and after an assessment, the Company concluded that this asset, valued at $1.4 million,&#13;was impaired. Therefore, the Company wrote off the value of this IPR&amp;#38;D asset, incurring a non-cash charge of $1.4 million in&#13;the fourth quarter of 2016.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;At September 30, 2018 and 2017, after&#13;the Company&amp;#8217;s annual assessments of the totality of the events that could impair IPR&amp;#38;D, the Company determined certain&#13;IPR&amp;#38;D assets related to the development of its glioblastoma multiforme cancer (GBM) product candidate may be impaired. To arrive&#13;at this determination, the Company assessed the status of studies in GBM conducted by its competitors and the Company&amp;#8217;s strategic&#13;commitment of resources to its studies in primary liver cancer and ovarian cancer. The Company estimated the fair value of the&#13;IPR&amp;#38;D related to GBM at September 30, 2018 and 2017 using the multi-period excess earnings method (MPEEM). After its assessment&#13;on September 30, 2017, the Company concluded that the GBM asset, valued at $9.4 million, was partially impaired and wrote down&#13;the GBM asset to $6.9 million on September 30, 2017, incurring a non-cash charge of $2.5 million in the third quarter of 2017.&#13;In connection with the write down of this IPR&amp;#38;D asset on September 30, 2017, the Company concluded there was a reduced probability&#13;of payments of the earn-out milestones associated with the GBM asset and therefore reduced the earn-out milestone liability from&#13;$13.8 million to $12.5 million, recording a non-cash gain of approximately $1.3 million in the third quarter of 2017. After its&#13;assessment on September 30, 2018, the Company concluded that the GBM asset, valued at $6.9 million, was partially impaired and&#13;wrote down the GBM asset to $2.4 million on September 30, 2018, incurring a non-cash charge of $4.5 million in the third quarter&#13;of 2018. In connection with the write down of this IPR&amp;#38;D asset, the Company concluded there was a reduced probability of payment&#13;of the earn-out milestones associated with the GBM asset and therefore reduced the earn-out milestone liability from $13.1 million&#13;to $9.0 million, recording a non-cash gain of approximately $4.1 million in the third quarter of 2018.&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;As no other indicators of impairment&#13;existed during the first nine months of 2018, the Company concluded none of the other IPR&amp;#38;D assets were impaired at September&#13;30, 2018.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Pursuant to the EGEN Purchase Agreement,&#13;EGEN provided certain covenants (&amp;#8220;Covenant Not To Compete&amp;#8221;) to the Company whereby EGEN agreed, during the period ending&#13;on the seventh anniversary of the closing date of the acquisition on June 20, 2014, not to enter into any business, directly or&#13;indirectly, which competes with the business of the Company nor will it contact, solicit or approach any of the employees of the&#13;Company for purposes of offering employment. The Covenant Not To Compete which was valued at approximately $1.6 million at the&#13;date of the EGEN acquisition has a definitive life and is amortized on a straight-line basis over its life of 7 years. The Company&#13;recognized amortization expense of $56,829 and $170,487 in each of the three and nine-month periods ended September 30, 2018 and&#13;2017, respectively. The carrying value of the Covenant Not to Compete was $625,121, net of $966,093 accumulated amortization, as&#13;of September 30, 2018 and $795,608, net of $795,606 accumulated amortization, as of December 31, 2017&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The purchase price exceeded the estimated&#13;fair value of the net assets acquired by approximately $2.0 million which was recorded as Goodwill. Goodwill represents the difference&#13;between the total purchase price for the net assets purchased from EGEN and the aggregate fair values of tangible and intangible&#13;assets acquired, less liabilities assumed. Goodwill is reviewed for impairment at least annually as of our third quarter ended&#13;September 30 or sooner if we believe indicators of impairment exist. As of September 30, 2018, we concluded that the Company&amp;#8217;s&#13;fair value exceeded its carrying value therefore &amp;#8220;it is not more likely than not&amp;#8221; that the Goodwill was impaired.&lt;/p&gt;</us-gaap:BusinessCombinationDisclosureTextBlock>
    <us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 9. Accrued Liabilities&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Other accrued liabilities as of September&#13;30, 2018 and December 31, 2017 include the following:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;September 30, 2018&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;December 31, 2017&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 58%; text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Amounts due to contract research organizations and &lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;other contractual agreements&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 18%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;730,811&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 18%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;665,373&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Accrued payroll and related benefits&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1,048,077&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1,258,265&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Accrued professional fees&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;341,240&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;264,668&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Other&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;20,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;94,521&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Total&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2,140,128&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2,282,827&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock>
    <us-gaap:DebtDisclosureTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 10. Note Payable&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;i&gt;Horizon Credit Agreement&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On June 27, 2018, the Company entered&#13;into a loan agreement with Horizon Technology Finance Corporation (&amp;#8220;Horizon&amp;#8221;) that provided $10 million in new capital&#13;(the &amp;#8220;Horizon Credit Agreement&amp;#8221;). The Company drew down $10 million upon closing of the Horizon Credit Agreement on&#13;June 27, 2018. The Company will use the funding provided under the Horizon Credit Agreement for working capital and advancement&#13;of its product pipeline.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The obligations under the Horizon Credit&#13;Agreement are secured by a first-priority security interest in substantially all assets of Celsion other than intellectual property&#13;assets. The obligations will bear interest at a rate calculated based on one-month LIBOR plus 7.625%. Payments under the loan agreement&#13;are interest only for the first twenty-four (24) months after loan closing, followed by a 24-month amortization period of principal&#13;and interest through the scheduled maturity date. At its option, the Company can prepay all of the outstanding principal balance&#13;by prepaying the outstanding principal balance and an amount equal to 1-3% of the outstanding principal balance at that time, based&#13;on the amount of time prior to the maturity date of the notes.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The Horizon Credit Agreement contains&#13;customary representations, warranties and affirmative and negative covenants including, among other things, covenants that limit&#13;or restrict Celsion&amp;#8217;s ability to grant liens, incur indebtedness, make certain restricted payments, merge or consolidate&#13;and make dispositions of assets. Upon the occurrence of an event of default under the Horizon Credit Agreement, the lenders may&#13;cease making loans, terminate the Horizon Credit Agreement, declare all amounts outstanding to be immediately due and payable and&#13;foreclose on or liquidate Celsion&amp;#8217;s assets that comprise the lenders&amp;#8217; collateral. The Horizon Credit Agreement specifies&#13;a number of events of default (some of which are subject to applicable grace or cure periods), including, among other things, non-payment&#13;defaults, covenant defaults, a material adverse effect on Celsion or its assets, cross-defaults to other material indebtedness,&#13;bankruptcy and insolvency defaults and material judgment defaults.&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;As a fee in connection with the Horizon&#13;Credit Agreement, Celsion issued Horizon warrants exercisable for a total of 190,114 shares of Celsion&amp;#8217;s common stock (the&#13;&amp;#8220;Horizon Warrants&amp;#8221;) at a per share exercise price of $2.63. The Horizon Warrants are immediately exercisable for cash&#13;or by net exercise from the date of grant and will expire after ten years from the date of grant. Celsion is required to register&#13;the common stock underlying the Horizon Warrants within 90 days from the date of grant and use its best efforts to keep it effective.&#13;The Company valued the Horizon Warrants issued using the Black-Scholes option pricing model and recorded a total of $507,116 as&#13;a direct deduction from the debt liability consistent with the presentation of a debt discount and are being amortized as interest&#13;expense using the effective interest method over the life of the loan.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In connection with the Horizon Credit&#13;Agreement, the Company incurred financing fees and expenses totaling $175,000 which are recorded and classified as debt discount.&#13;In addition, the Company paid loan origination fees of $100,000 which has been recorded and classified as debt discount. These&#13;debt discount amounts totaling $782,116 are being amortized as interest expense using the effective interest method over the life&#13;of the loan. Also, in connection with each of the Horizon Credit Agreements, the Company is required to pay an end of term charge&#13;equal to 4.0% of the original loan amount at time of maturity. Therefore, these amounts totaling $400,000 are being amortized as&#13;interest expense using the effective interest method over the life of the loan.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;For the three and nine-month periods&#13;ended September 30, 2018 the Company incurred $248,270 and $259,064, respectively, in interest expense and amortized $97,458 and&#13;$101,695, respectively, as interest expense for debt discounts and end of term charges in connection with the Horizon Credit Agreement.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Following is a schedule of future principle&#13;payments, net of unamortized debt discounts and amortized end of term charges, due on the Horizon Credit Agreement:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;For the year ending&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;September 30&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2019&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 79%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2021&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 18%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;4,583,333&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2022&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;5,000,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2023 and thereafter&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;416,667&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Subtotal of future principle payments&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;10,000,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Unamortized debt issuance costs, net&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(680,421&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Total&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9,319,579&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;i&gt;Hercules Credit Agreement&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In November 2013, the Company entered&#13;into a loan agreement with Hercules Technology Growth Capital, Inc. (Hercules) which permits up to $20 million in capital to be&#13;distributed in multiple tranches (the Hercules Credit Agreement). The Company drew the first tranche of $5 million upon closing&#13;of the Hercules Credit Agreement in November 2013 and used approximately $4 million of the proceeds to repay the outstanding obligations&#13;under its loan agreement with Oxford Finance LLC and Horizon Technology Finance Corporation as discussed further below. On June&#13;10, 2014, the Company closed the second $5 million tranche under the Hercules Credit Agreement. The proceeds were used to fund&#13;the $3.0 million upfront cash payment associated with Celsion&amp;#8217;s acquisition of EGEN, as well as the Company&amp;#8217;s transaction&#13;costs associated with the EGEN acquisition. Upon the closing of the second tranche, the Company had drawn down a total of $10 million&#13;under the Hercules Credit Agreement.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The obligations under the Hercules Credit&#13;Agreement were in the form of secured indebtedness bearing interest at a calculated prime-based variable rate (11.25% per annum&#13;since inception through December 17, 2015, 11.50% from December 18, 2015 through December 15, 2016 and 11.75% since). Payments&#13;under the loan agreement were interest only for the first twelve months after loan closing, followed by a 30 -month amortization&#13;period of principal and interest through the scheduled maturity date of June 1, 2017. In connection with the Hercules Credit Agreement,&#13;the Company incurred cash expenses of $122,378 which were recorded as deferred financing fees. These deferred financing fees were&#13;amortized as interest expense using the effective interest method over the life of the loan. In addition, the Company paid loan&#13;origination fees of $230,000 which has been classified as debt discount. This amount is being amortized as interest expense using&#13;the effective interest method over the life of the loan.&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;As a fee associated with the Hercules&#13;Credit Agreement, the Company issued Hercules a warrant for a total of 6,963 shares of the Company&amp;#8217;s common stock (the Hercules&#13;Warrant) at a per share exercise price of $50.26, exercisable for cash or by net exercise from November 25, 2013. Upon the closing&#13;of the second tranche on June 10, 2014, this warrant became exercisable for an additional 6,963 shares of the Company&amp;#8217;s&#13;common stock. The Hercules Warrant will expire November 25, 2018. Hercules has certain rights to register the common stock underlying&#13;the Hercules Warrant pursuant to a Registration Rights Agreement with the Company dated November 25, 2013. The registration rights&#13;expire on the date when such stock may be sold under Rule 144 without restriction or upon the first-year anniversary of the registration&#13;statement for such stock, whichever is earlier. The common stock issuable pursuant to the Hercules Warrant was filed pursuant&#13;to Rule 415 under the Securities Act of 1933 on the Prospectus for Registration Statement No. 333 - 193936 and was declared effective&#13;on September 30, 2014. The Company valued the Hercules Warrants issued using the Black-Scholes option pricing model and recorded&#13;a total of $476,261 as a direct deduction from the debt liability consistent with the presentation of a debt discount and are&#13;being amortized as interest expense using the effective interest method over the life of the loan. Also, in connection with each&#13;of the $5.0 million tranches, the Company was required to pay an end of term charge equal to 3.5% of each original loan amount&#13;at time of maturity. Therefore, these amounts totaling $350,000 were amortized as interest expense using the effective interest&#13;method over the life of the loan. The loan balance and end of term charges on the Hercules Credit Agreement was paid in full in&#13;June 2017. For the three-month period ended September 30, 2017 the Company did not incur any interest expense and it did not amortize&#13;any interest expense for deferred fees, debt discount and end of term charges in connection with the Hercules Credit Agreement.&#13;For the nine-month period ended September 30, 2017, the Company incurred $56,386 in interest expense and amortized $35,370 as&#13;interest expense for deferred fees, debt discount and end of term charges in connection with the Hercules Credit Agreement.&lt;/p&gt;</us-gaap:DebtDisclosureTextBlock>
    <us-gaap:StockholdersEquityNoteDisclosureTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 11. Stockholders&amp;#8217; Equity&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In September 2015, the Company filed&#13;with the SEC a $75 million shelf registration statement on Form S-3 (the 2015 Shelf Registration Statement) (File No. 333-206789)&#13;that allows the Company to issue any combination of common stock, preferred stock or warrants to purchase common stock or preferred&#13;stock. This shelf registration was declared effective on September 25, 2015. The 2015 Shelf Registration Statement expired on September&#13;25, 2018.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In September 2018, the Company filed&#13;with the SEC a new $75 million shelf registration statement on Form S-3 (the 2018 Shelf Registration Statement) (File No. 333-227236)&#13;that allows the Company to issue any combination of common stock, preferred stock or warrants to purchase common stock or preferred&#13;stock. This shelf registration was declared effective on October 12, 2018 and will expire three years from that date.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;i&gt;&lt;u&gt;Increase in the Number of Authorized&#13;Shares&lt;/u&gt;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;At the 2016 Annual Meeting of Stockholders&#13;of the Company in June 2016, the Company&amp;#8217;s stockholders approved an increase in the number of the authorized shares of the&#13;Company&amp;#8217;s common stock from 75,000,000 shares to 112,500,000 shares. The number of the authorized shares of preferred stock&#13;remains at 100,000 shares. The aggregate number of shares of all classes of stock that the Company may issue, after giving effect&#13;to such amendment as approved by the stockholders, will be 112,600,000 shares.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;i&gt;&lt;u&gt;Reverse Stock Split&lt;/u&gt;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On May 26, 2017, the Company effected&#13;a 14-for-1 reverse stock split of its common stock which was made effective for trading purposes as of the commencement of trading&#13;on May 30, 2017. As of that date, each 14 shares of issued and outstanding common stock and equivalents was consolidated into one&#13;share of common stock. All shares have been restated to reflect the effects of the 14-for-1 reverse stock split. In addition, at&#13;the market open on May 30, 2017, the Company&amp;#8217;s common stock started trading under a new CUSIP number 15117N503 although the&#13;Company&amp;#8217;s ticker symbol, CLSN, remained unchanged.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The reverse stock split was previously&#13;approved by the Company&amp;#8217;s stockholders at the 2017 Annual Meeting held on May 16, 2017, and the Company subsequently filed&#13;a Certificate of Amendment to its Certificate of Incorporation to effect the stock consolidation. The primary reasons for the reverse&#13;stock split and the amendment are:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="width: 10px; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 48px; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;To increase the market price of the Company&amp;#8217;s common stock making it more attractive to a broader range of institutional and other investors, and&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;To provide the Company with additional capital resources and flexibility sufficient to execute its business plans including the establishment of strategic relationships with other companies and to ensure its ability to raise additional capital as necessary.&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Immediately prior to the reverse stock&#13;split, the Company had 56,982,418 shares of common stock outstanding which consolidated into 4,070,172 shares of the Company&amp;#8217;s&#13;common stock. No fractional shares were issued in connection with the reverse stock split. Holders of fractional shares have been&#13;paid out in cash for the fractional portion with the Company&amp;#8217;s overall exposure for such payouts consisting of a nominal&#13;amount. The number of outstanding options and warrants were adjusted accordingly, with outstanding options being reduced from approximately&#13;2.4 million to approximately 0.2 million and outstanding warrants being reduced from approximately 33.5 million to approximately&#13;2.4 million.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;u&gt;October 2017 &lt;i&gt;Underwritten Offering&lt;/i&gt;&lt;/u&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On October 27, 2017, the Company entered&#13;into an underwriting agreement (the &amp;#8220;Underwriting Agreement&amp;#8221;) with Oppenheimer&amp;#38; Co. Inc. (the &amp;#8220;Underwriter&amp;#8221;),&#13;relating to the issuance and sale (the &amp;#8220;October 2017 Underwritten Offering&amp;#8221;) of 2,640,000 shares (the &amp;#8220;Shares&amp;#8221;)&#13;of the Company&amp;#8217;s common stock, $0.01 par value per share (the &amp;#8220;Common Stock&amp;#8221;), and warrants to purchase an aggregate&#13;of 1,320,000 shares of Common Stock. Each share of Common Stock is being sold together with 0.5 warrants (the &amp;#8220;Investor Warrants&amp;#8221;),&#13;each whole Investor Warrant being exercisable for one share of Common Stock, at an offering price of $2.50 per share and related&#13;Investor Warrants.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Pursuant to the terms of the Underwriting&#13;Agreement, the Underwriter agreed to purchase the Shares and related Investor Warrants from the Company at a price of $2.325 per&#13;share and related Investor Warrants. Each Investor Warrant is exercisable six months from the date of issuance. The Investor Warrants&#13;have an exercise price of $3.00 per whole share and expire five years from the date first exercisable.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The Company received $6.6 million of&#13;gross proceeds from the sale of the Shares and Investor Warrant. The October 2017 Underwritten Offering was made pursuant to the&#13;2015 Shelf Registration Statement and the related prospectus supplement. The Company also issued to the Underwriter warrants to&#13;purchase up to 66,000 shares of the Company&amp;#8217;s common stock, such issuance being exempt from registration pursuant to Section&#13;4(a)(2) of the Securities Act. Each Underwriter warrant is exercisable six months from the date of issuance, have an exercise price&#13;of $2.87 per whole share, and expire five years from the date first exercisable&lt;i&gt;.&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;u&gt;July 6, 2017 &lt;i&gt;Common Stock Offering&lt;/i&gt;&lt;/u&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On July 6, 2017, the Company entered&#13;into a securities purchase agreement with several investors, pursuant to which the Company agreed to issue and sell, in a registered&#13;direct offering, an aggregate of 2,050,000 shares of common stock of the Company at an offering price of $2.07 per share for gross&#13;proceeds of $4,243,500 before the deduction of the placement agent fee and offering expenses. In addition, the Company sold Pre-Funded&#13;Series CCC Warrants to purchase 385,000 shares of common stock (and the shares of common stock issuable upon exercise of the Pre-Funded&#13;Series CCC Warrants), in lieu of shares of common stock to the extent that the purchase of common stock would cause the beneficial&#13;ownership of the Purchaser, together with its affiliates and certain related parties, to exceed 9.99% of our common stock. The&#13;Pre-Funded Series CCC Warrants were sold at an offering price of $2.06 per share for gross proceeds of $793,100, are immediately&#13;exercisable for $0.01 per share of common stock and do not have an expiration date. In a concurrent private placement, the Company&#13;agreed to issue to each investor, for each share of common stock and pre-funded warrant purchased in the offering, a Series AAA&#13;Warrant and Series BBB Warrant, each to purchase one share of common stock. The Series AAA Warrants are initially exercisable six&#13;months following issuance and terminate five and one-half years following issuance. The Series AAA Warrants have an exercise price&#13;of $2.07 per share and are exercisable to purchase an aggregate of 2,435,000 shares of common stock. The Series BBB Warrants are&#13;immediately exercisable following issuance and terminate twelve months following issuance. The Series BBB Warrants have an exercise&#13;price of $4.75 per share and are exercisable to purchase an aggregate of 2,435,000 shares of common stock. Subject to limited exceptions,&#13;a holder of a Series AAA and Series BBB Warrant will not have the right to exercise any portion of its warrants if the holder,&#13;together with its affiliates, would beneficially own in excess of 9.99% of the number of shares of common stock outstanding immediately&#13;after giving effect to such exercise. During the fourth quarter of 2017, all 385,000 of the Series CCC Pre-Funded warrants were&#13;exercised in full.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On October 4, 2017, the Company entered&#13;into letter agreements (the &amp;#8220;Exercise Agreements&amp;#8221;) with the holders of the Series AAA and Series BBB Warrants issued&#13;in the July 6, 2017 Common Stock Offering (the &amp;#8220;Exercising Holders&amp;#8221;). The Exercise Agreements amended the Series AAA&#13;Warrants to permit their immediate exercise. Prior to the execution of the Exercise Agreements, the Series AAA Warrants were not&#13;exercisable until January 11, 2018. Pursuant to the Exercise Agreements, the Exercising Holders and the Company agreed that the&#13;Exercising Holders would exercise all of their Existing Warrants with respect to 4,665,000 shares of Common Stock underlying such&#13;Existing Warrants. The Series AAA Warrants and Series BBB Warrants were exercised at a price of $2.07 per share and $4.75 per share,&#13;respectively, which were their respective original exercise prices. The Company received approximately $16.6 million in gross proceeds&#13;from the sale of these warrants.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The Exercise Agreements also provide&#13;for the issuance of 1,166,250 Series DDD Warrants, each to purchase one share of Common Stock (the &amp;#8220;Series DDD Warrants&amp;#8221;).&#13;The Series DDD Warrants have an exercise price $6.20, are exercisable one year following issuance and terminate six months after&#13;they are initially exercisable. The Series DDD Warrants and the shares of Common Stock issuable upon the exercise of the Series&#13;DDD Warrants were offered pursuant to the exemption provided in Section 4(a)(2) under the Securities Act or Rule 506(b) promulgated&#13;thereunder. Pursuant to the Exercise Agreements, the Series DDD Warrants shall be substantially in the form of the Existing Warrants&#13;and the Company will be required to register for resale the shares of Common Stock underlying the Series DDD Warrants.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;u&gt;February 14, 2017 &lt;i&gt;Public Offering&lt;/i&gt;&lt;/u&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On February 14, 2017, the Company entered&#13;into a securities purchase agreement whereby it sold, in a public offering (the &amp;#8220;February 2017 Public Offering&amp;#8221;), an&#13;aggregate of 1,384,704 shares of common stock of the Company at an offering price of $3.22 per share. In addition, the Company&#13;sold Series AA Warrants (the &amp;#8220;Series AA Warrants&amp;#8221;) to purchase up to 1,177,790 shares of common stock and Pre-Funded&#13;Series BB Warrants (the &amp;#8220;Pre-Funded Series BB Warrants&amp;#8221;) to purchase up to 185,713 shares of common stock. The Series&#13;AA Warrants have an exercise price of $3.22 per share, have a five-year life and are immediately exercisable. The Pre-Funded Series&#13;BB Warrants were offered at $3.08 per share, were immediately exercisable for $0.14 per share of common stock, do not have an expiration&#13;date and were issued in lieu of shares of common stock to the extent that the purchase of common stock would cause the beneficial&#13;ownership of the purchaser of such shares, together with its affiliates and certain related parties, to exceed 9.99% of our common&#13;stock. The Company received approximately $5.0 million in gross proceeds before the deduction of the placement agent fees and offering&#13;expenses (excluding any proceeds from the exercise of the warrants) in the February 2017 Public Offering.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In connection with the February 2017&#13;Public Offering, the Company filed with the SEC a registration statement on Form S-1 (Registration No. 333-215321) on December&#13;23, 2016, as amended by Pre-Effective Amendment No. 1 filed with the Commission on January 20, 2017, as further amended by Pre-Effective&#13;Amendment No. 2 filed with the Commission on February 13, 2017, as further amended by Pre-Effective Amendment No. 3 filed with&#13;the Commission on February 13, 2017 and as further amended by Pre-Effective Amendment No. 4 filed with the Commission on February&#13;14, 2017 for the registration of the securities issued and sold under the Securities Act of 1933, as amended.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;As of December 31, 2017, all 185,713&#13;of the Series BB Pre-Funded warrants were exercised in full. During 2017, we received approximately $2.4 million from the exercise&#13;of Series AA Warrants to purchase 747,254 shares of common stock.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;i&gt;&lt;u&gt;Reduced Exercise Price of Warrants&lt;/u&gt;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On February 22, 2013, the Company entered&#13;into a securities purchase agreement with certain investors pursuant to which the Company agreed, among other things, to issue&#13;warrants (the &amp;#8220;2013 Warrants&amp;#8221;) to purchase up to 95,811 shares of our common stock at an exercise price of $74.34 per&#13;share to such investors in a registered direct offering. On January 15, 2014, the Company entered into a securities purchase agreement&#13;with certain investors pursuant to which the Company agreed, among other things, to issue warrants (the &amp;#8220;2014 Warrants&amp;#8221;)&#13;to purchase up to 64,348 shares of our common stock at an exercise price of $57.40 per share to such investors in a registered&#13;direct offering. On June 9, 2017, the Company entered into warrant exercise agreements (the &amp;#8220;Exercise Agreements&amp;#8221;)&#13;with certain holders of the 2013 Warrants, the 2014 Warrants and the June 2016 Warrants (the &amp;#8220;Exercising Holders&amp;#8221;),&#13;which Exercising Holders own, in the aggregate, warrants exercisable for 790,410 shares of our common stock. Pursuant to the Exercise&#13;Agreements, the Exercising Holders and the Company agreed that the Exercising Holders would exercise their 2013 Warrants, the 2014&#13;Warrants and the June 2016 Warrants with respect to 790,410 shares of our common stock underlying such warrants for a reduced exercise&#13;price equal to $2.70 per share. The Company received aggregate gross proceeds of approximately $2.1 million from the exercise of&#13;the 2013 Warrants, the 2014 Warrants and the June 2016 Warrants by the Exercising Holders.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The reduced exercise price of the 2013&#13;Warrants, the 2014 Warrants and the June 2016 Series C Warrants increased the fair value of the warrants by approximately $0.2&#13;million. This increase in fair value is recorded as a deemed dividend in additional paid in capital due to the retained deficit&#13;and it increased the net loss available to common shareholders on the consolidate statement of operations.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On May 27, 2015, the Company entered&#13;into a securities purchase agreement with certain investors pursuant to which the Company agreed, among other things, to issue&#13;warrants (the &amp;#8220;2015 Warrants&amp;#8221;) to purchase up to 139,284 shares of the Company&amp;#8217;s common stock at an exercise&#13;price of $36.40 per share, to such investors in a registered direct offering. Between June 22, 2017 through June 26, 2017, the&#13;Company and holders of the 2015 Warrants and the December 2016 Warrants (the &amp;#8220;Exercising Investors&amp;#8221;) entered into agreements&#13;whereby the Company agreed that the Exercising investors would exercise their 2015 Warrants and the June 2016 Warrants with respect&#13;to 506,627 shares of our common stock underlying such warrants for a reduced exercise price equal to $1.65 per share. The Company&#13;received aggregate gross proceeds of approximately $0.8 million from the exercise of the 2015 Warrants and the June 2016 Warrants&#13;by the Exercising Investors.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The reduced exercise price of the 2015&#13;Warrants increased the fair value of the warrants by approximately $0.1 million. This increase in fair value is recorded as a deemed&#13;dividend in additional paid in capital due to the retained deficit and it increased the net loss available to common shareholders&#13;on the consolidate statement of operations.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;i&gt;&amp;#160;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;i&gt;&lt;u&gt;Aspire Purchase Agreement&lt;/u&gt;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On August 31, 2018, we entered into&#13;a common stock purchase agreement (the &amp;#8220;Aspire Purchase Agreement&amp;#8221;) with Aspire Capital Fund, LLC (&amp;#8220;Aspire Capital&amp;#8221;)&#13;which provides that, upon the terms and subject to the conditions and limitations set forth therein, Aspire Capital is committed&#13;to purchase up to an aggregate of $15.0 million of shares of the Company&amp;#8217;s common stock over the 24-month term of the Aspire&#13;Purchase Agreement. On October 12, 2018, the Company filed with the SEC a prospectus supplement to the 2018 Shelf Registration&#13;Statement registering all of the shares of common stock that may be offered to Aspire Capital from time to time.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Under the Aspire Purchase Agreement,&#13;on any trading day selected by the Company, the Company has the right, in its sole discretion, to present Aspire Capital with a&#13;purchase notice (each, a &amp;#8220;Purchase Notice&amp;#8221;), directing Aspire Capital (as principal) to purchase up to 100,000 shares&#13;of the Company&amp;#8217;s common stock per business day, up to $15.0 million of the Company&amp;#8217;s common stock in the aggregate&#13;at a per share price (the &amp;#8220;Purchase Price&amp;#8221;) equal to the lesser of:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%"&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="width: 24px; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: top; width: 24px; text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: top; text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;the lowest sale price of the Company&amp;#8217;s common stock on the purchase date; or&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="vertical-align: top; text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9679;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="vertical-align: top; text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;the arithmetic average of the three (3) lowest closing sale prices for the Company&amp;#8217;s common stock during the ten (10) consecutive trading days ending on the trading day immediately preceding the purchase date.&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The Company and Aspire Capital also&#13;may mutually agree to increase the number of shares that may be sold to as much as an additional 2,000,000 shares per business&#13;day.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In addition, on any date on which the&#13;Company submits a Purchase Notice to Aspire Capital in an amount equal to at least 100,000 shares, the Company also has the right,&#13;in its sole discretion, to present Aspire Capital with a volume-weighted average price purchase notice (each, a &amp;#8220;VWAP Purchase&#13;Notice&amp;#8221;) directing Aspire Capital to purchase an amount of stock equal to up to 30% of the aggregate shares of the Company&amp;#8217;s&#13;common stock traded on its principal market on the next trading day (the &amp;#8220;VWAP Purchase Date&amp;#8221;), subject to a maximum&#13;number of shares the Company may determine. The purchase price per share pursuant to such VWAP Purchase Notice is generally 97%&#13;of the volume-weighted average price for the Company&amp;#8217;s common stock traded on its principal market on the VWAP Purchase Date.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The Purchase Price will be adjusted&#13;for any reorganization, recapitalization, non-cash dividend, stock split, or other similar transaction occurring during the period(s)&#13;used to compute the Purchase Price. The Company may deliver multiple Purchase Notices and VWAP Purchase Notices to Aspire Capital&#13;from time to time during the term of the Purchase Agreement, so long as the most recent purchase has been completed.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;There are no trading volume requirements&#13;or restrictions under the Purchase Agreement, and the Company will control the timing and amount of sales of the Company&amp;#8217;s&#13;common stock to Aspire Capital. Aspire Capital has no right to require any sales by the Company but is obligated to make purchases&#13;from the Company as directed by the Company in accordance with the Purchase Agreement. There are no limitations on use of proceeds,&#13;financial or business covenants, restrictions on future fundings, rights of first refusal, participation rights, penalties or liquidated&#13;damages in the Purchase Agreement. In consideration for entering into the Purchase Agreement, concurrently with the execution of&#13;the Purchase Agreement, the Company issued to Aspire Capital 164,835 shares of the Company&amp;#8217;s common stock (the &amp;#8220;Commitment&#13;Shares&amp;#8221;). The Company&amp;#8217;s policy is to record specific incremental costs directly attributable to an offering as a charge&#13;against the gross proceeds, if any, when the offering becomes effective. These Commitment Shares valued at $450,000 were recorded&#13;in September 2018 as costs of equity financing and charged against additional paid-in capital. The Aspire Purchase Agreement may&#13;be terminated by the Company at any time, at its discretion, without any cost to the Company. Aspire Capital has agreed that neither&#13;it nor any of its agents, representatives and affiliates shall engage in any direct or indirect short-selling or hedging of the&#13;Company&amp;#8217;s common stock during any time prior to the termination of the Purchase Agreement. Any proceeds from the Company&#13;receives under the Aspire Purchase Agreement are expected to be used for working capital and general corporate purposes.&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&lt;i&gt;&amp;#160;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;i&gt;&lt;u&gt;Controlled Equity Offering&lt;/u&gt;&lt;/i&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On February 1, 2013, the Company entered&#13;into a Controlled Equity Offering SM Sales Agreement (the &amp;#8220;ATM Agreement&amp;#8221;) with Cantor Fitzgerald &amp;#38; Co., as sales&#13;agent (&amp;#8220;Cantor&amp;#8221;), pursuant to which Celsion could offer and sell, from time to time, through Cantor, shares of our&#13;common stock having an aggregate offering price of up to $25.0 million (the &amp;#8220;ATM Shares&amp;#8221;) pursuant to the 2015 Shelf&#13;Registration Statement. Under the ATM Agreement, Cantor may sell ATM Shares by any method deemed to be an &amp;#8220;at-the-market&amp;#8221;&#13;offering as defined in Rule 415 promulgated under the Securities Act of 1933, as amended, including sales made directly on The&#13;NASDAQ Capital Market, on any other existing trading market for our common stock or to or through a market maker. On October 10,&#13;2018, the Company delivered notice to Cantor terminating the ATM effective as of October 20, 2018. The Company has no further&#13;obligations under the Sales Agreement. From February 1, 2013 through September 30, 2018, the Company sold and issued an aggregate&#13;of 1,784,396 shares of common stock under the ATM Agreement, receiving approximately $12.8 million in gross proceeds.&lt;/p&gt;</us-gaap:StockholdersEquityNoteDisclosureTextBlock>
    <us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 12. Stock-Based Compensation&#13;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The Company has long-term compensation&#13;plans that permit the granting of equity based-awards in the form of stock options, restricted stock, restricted stock units, stock&#13;appreciation rights, other stock awards, and performance awards.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;At the 2018 Annual Stockholders Meeting&#13;of the Company held on May 15, 2018, stockholders approved the Celsion Corporation 2018 Stock Incentive Plan (the &amp;#8220;2018 Plan&amp;#8221;).&#13;The 2018 Plan, as adopted, permits the granting of 2,700,000 shares of Celsion common stock as equity awards in the form of incentive&#13;stock options, nonqualified stock options, restricted stock, restricted stock units, stock appreciation rights, other stock awards,&#13;performance awards, or in any combination of the foregoing. Prior to the adoption of the 2018 Plan, the Company had maintained&#13;the Celsion Corporation 2007 Stock Incentive Plan (the 2007 Plan). The 2007 Plan permitted the granting of 688,531 shares of Celsion&#13;common stock as equity awards in the form of incentive stock options, nonqualified stock options, restricted stock, restricted&#13;stock units, stock appreciation rights, phantom stock, performance awards, or in any combination of the foregoing. The 2018 Plan&#13;replaced the 2007 Plan although the 2007 Plan remains in effect for awards previously granted under the 2007 Plan. Under the terms&#13;of the 2018 Plan, any shares subject to an award under the 2007 Plan which are not delivered because of the expiration, forfeiture,&#13;termination or cash settlement of the award will become available for grant under the 2018 Plan.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The Company has issued stock awards&#13;to employees and directors in the form of stock options and restricted stock. Options are generally granted with strike prices&#13;equal to the fair market value of a share of Celsion common stock on the date of grant. Incentive stock options may be granted&#13;to purchase shares of common stock at a price not less than 100% of the fair market value of the underlying shares on the date&#13;of grant, provided that the exercise price of any incentive stock option granted to an eligible employee owning more than 10% of&#13;the outstanding stock of Celsion must be at least 110% of such fair market value on the date of grant. Only officers and key employees&#13;may receive incentive stock options.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Option and restricted stock awards vest&#13;upon terms determined by the Compensation Committee of the Board of Directors and are subject to accelerated vesting in the event&#13;of a change of control or certain terminations of employment. The Company issues new shares to satisfy its obligations from the&#13;exercise of options or the grant of restricted stock awards.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; background-color: white"&gt;On September&#13;28, 2018, the Compensation Committee of the Board of Directors approved the grant of (i) inducement stock options (the &amp;#8220;Inducement&#13;Option Grants&amp;#8221;) to purchase a total of 164,004 shares of Celsion common stock and (ii) inducement restricted stock awards&#13;(the &amp;#8220;Inducement Stock Grants&amp;#8221;) totaling 19,000 shares of Celsion common stock to three new employees. All awards have&#13;a grant date of September 28, 2018. Each of Inducement Option Grant has an exercise price per share equal to $2.77, the closing&#13;price of Celsion&amp;#8217;s common stock as reported by Nasdaq on September 28, 2018. Each Inducement Option Grant will vest over&#13;three years, with one-third vesting on the one-year anniversary of the employee&amp;#8217;s first day of employment with the Company&#13;and one-third vesting on the second and third anniversaries thereafter, subject to the new employee&amp;#8217;s continued service relationship&#13;with the Company on each such date. Each Inducement Option Grant has a ten-year term and is subject to the terms and conditions&#13;of the applicable stock option agreement. Each of Inducement Stock Grant will vest on the one-year anniversary of the employee&amp;#8217;s&#13;first day of employment with the Company and are subject to the new employee&amp;#8217;s continued service relationship with the Company&#13;through such date and is subject to the terms and conditions of the applicable restricted stock agreement.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;As of September 30, 2018, there were&#13;a total of 3,399,893 shares of Celsion common stock reserved for issuance under the 2018 Plan, which were comprised of 3,064,741&#13;shares of Celsion common stock subject to equity awards previously granted under the 2018 Plan and 2007 Plan and 335,152 shares&#13;of Celsion common stock available for future issuance under the 2018 Plan. As of September 30, 2018, there were a total of 183,004&#13;of Celsion common stock subject to outstanding inducement awards.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Total compensation cost charged related&#13;to stock options and restricted stock awards amounted to $614,528 and $146,896 for the three-month periods ended September 30,&#13;2018 and 2017, respectively. Total compensation cost charged related to stock options and restricted stock awards amounted to $3,985,829&#13;and $951,488 for the nine-month periods ended September 30, 2018 and 2017, respectively. As of September 30, 2018, there was $2.5&#13;million of total unrecognized compensation cost related to non-vested stock-based compensation arrangements. That cost is expected&#13;to be recognized over a weighted-average period of 1.1 years. The weighted average grant date fair values of the stock options&#13;granted during then nine-month periods ended September 30, 2018 and 2017 was $2.36 and $2.69, respectively.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;A summary of stock option awards and&#13;restricted stock grants for the nine-months ended September 30, 2018 is presented below:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="7" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Stock Options&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="7" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Restricted Stock Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Weighted&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Average&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Equity Awards&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Options&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Outstanding&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Weighted&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Average&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Exercise&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Price&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Non-vested&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Restricted&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Stock&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Outstanding&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Weighted&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Average&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Grant&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Date&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Fair Value&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Contractual&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Terms of&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Equity&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Awards&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;(in years)&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 40%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Equity awards outstanding at January 1, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 9%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;703,442&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;10.34&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 9%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 9%; text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Equity awards granted&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2,629,004&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.26&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;35,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.71&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Vested and issued&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(6,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.64&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Equity awards forfeited, cancelled or expired&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(113,701&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;40.23&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Equity awards outstanding at September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;3,218,745&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.67&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;29,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.72&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9.4&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Aggregate intrinsic value of outstanding equity awards at September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1,384,245&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1,700&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Equity awards exercisable at September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1,677,998&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.94&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9.3&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Aggregate intrinsic value of equity awards exercisable at September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;706,552&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The fair values of stock options granted&#13;were estimated at the date of grant using the Black-Scholes option pricing model. The Black-Scholes option pricing model was originally&#13;developed for use in estimating the fair value of traded options, which have different characteristics from Celsion&amp;#8217;s stock&#13;options. The model is also sensitive to changes in assumptions, which can materially affect the fair value estimate. The Company&#13;used the following assumptions for determining the fair value of options granted under the Black-Scholes option pricing model:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Nine Months Ended September 30,&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2018&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2017&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 66%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Risk-free interest rate&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 14%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.82 &amp;#8211; 3.02&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 14%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.21&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;%&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Expected volatility&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;99.9 -102.1&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;90.4&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;%&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Expected life (in years)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;8.0 - 10.0&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;10.00&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Expected dividend yield&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;%&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Expected volatilities utilized in the&#13;model are based on historical volatility of the Company&amp;#8217;s stock price. The risk-free interest rate is derived from values&#13;assigned to U.S. Treasury bonds with terms that approximate the expected option lives in effect at the time of grant. Starting&#13;in 2017, the Company elected to account for any forfeitures when they occur.&lt;/p&gt;</us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock>
    <CLSN:EarnoutMilestoneLiabilityDisclosureTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 13. Earn-out Milestone Liability&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The total aggregate purchase price for&#13;the EGEN Acquisition included potential future Earn-out Payments contingent upon achievement of certain milestones. The difference&#13;between the aggregate $30.4 million in future Earn-out Payments and the $13.9 million included in the fair value of the acquisition&#13;consideration at June 20, 2014 was based on the Company&amp;#8217;s risk-adjusted assessment of each milestone (10% to 67%) and utilizing&#13;a discount rate based on the estimated time to achieve the milestone (1.5 to 2.5 years). The earn-out milestone liability will&#13;be fair valued at the end of each quarter and any change in their value will be recognized in the financial statements.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;As of September 30, 2018, June 30, 2018&#13;and December 31, 2017, the Company fair valued these milestones at $9.0 million, $13.1 million and $12.5 million, respectively,&#13;and recognized a non-cash gain of $4,114,995 and $3,567,671 during the three and nine months ended September 30, 2018 as a result&#13;of the change in the fair value of these milestones from the beginning of each period, respectively.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;As of September 30, 2017, June 30, 2017&#13;and December 31, 2016, the Company fair valued these milestones at $12.5 million, $13.8 million and $13.2 million, respectively,&#13;and recognized a non-cash gain of $1,246,151 and $670,172 during the three and nine months ended September 30, 2017 as a result&#13;of the change in the fair value of these milestones from the beginning of each period, respectively&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The following is a summary of the changes&#13;in the earn-out milestone liability for 2018:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 79%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Balance at January 1, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 18%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,538,525&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Non-cash gain from the adjustment for the change in fair value&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(3,567,671&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Balance at September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;8,970,854&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The following is a schedule of the Company&amp;#8217;s&#13;risk-adjustment assessment of each milestone:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Date&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Risk-adjustment Assessment&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;of each Milestone&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Discount Rate&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Estimated Time&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;to Achieve&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 21%; text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 32%; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;0% to 80%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 18%; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 22%; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;0.00 to 1.17 year&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;June 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;35% to 80%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;0.83 to 1.00 years&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;December 31, 2017&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;35% to 80%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1.33 to 1.50 years&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;September 30, 2017&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;35% to 80%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1.25 to 1.75 years&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;June 30, 2017&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;50% to 80%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1.50 to 2.00 years&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;December 31, 2016&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;50% to 80%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.00 to 2.50 years&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</CLSN:EarnoutMilestoneLiabilityDisclosureTextBlock>
    <us-gaap:CommitmentsAndContingenciesDisclosureTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 15. Contingent Liabilities and&#13;Commitments &lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In July 2011, the Company executed a&#13;lease (the &amp;#8220;Lease&amp;#8221;) with Brandywine Operating Partnership, L.P. (&amp;#8220;Brandywine&amp;#8221;), a Delaware limited partnership&#13;for a 10,870 square foot premises located in Lawrenceville, New Jersey. In October 2011, the Company relocated its offices to Lawrenceville,&#13;New Jersey from Columbia, Maryland. The lease has a term of 66 months and provides for 6 months of rent free, with the first monthly&#13;rent payment of approximately $23,000 due and paid in April 2012. Also, as required by the Lease, the Company provided Brandywine&#13;with an irrevocable and unconditional standby letter of credit for $250,000, which the Company secured with an escrow deposit at&#13;its banking institution of this same amount. The standby letter of credit was reduced by $50,000 on each of the 19th, 31st and&#13;43rd months from the initial term, and the remaining $100,000 amount was reduced when the Lease term expired in April 2017. In&#13;late 2015, Lenox Drive Office Park LLC, purchased the real estate and office building and assumed the lease. This lease was set&#13;to expire on April 30, 2017. In April 2017, the Company and the landlord amended the Lease effective May 1, 2017. The Lease amendment&#13;extended the term of the agreement for an additional 64 months, reduced the premises to 7,565 square feet, reduced the monthly&#13;rent and provided four months free rent. The monthly rent will range from approximately $18,900 in the first year to approximately&#13;$20,500 in the final year of the amendment. The Company also has a one-time option to cancel the lease as of the 24th month after&#13;the commencement date of the Lease amendment.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In connection with the EGEN Asset Purchase&#13;Agreement in June 2014, the Company assumed the existing lease with another landlord for an 11,500 square foot premises located&#13;in Huntsville Alabama. This lease expired at the end of January 2018. In January 2018, the Company and this landlord entered into&#13;a new 60-month lease which reduced the premises to 9,049 square feet with rent payments of approximately $18,100 per month.&lt;/p&gt;</us-gaap:CommitmentsAndContingenciesDisclosureTextBlock>
    <CLSN:LicensingTransactionTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 16. Technology Development and&#13;Licensing Agreements&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On May 7, 2012, the Company entered&#13;into a long-term commercial supply agreement with Zhejiang Hisun Pharmaceutical Co. Ltd. (Hisun) for the production of ThermoDox&amp;#174;&#13;in mainland China, Hong Kong and Macau (the &amp;#8220;China territory&amp;#8221;). In accordance with the terms of the agreement, Hisun&#13;will be responsible for providing all of the technical and regulatory support services, including the costs of all technical transfer,&#13;registration and bioequivalence studies, technical transfer costs, Celsion consultative support costs and the purchase of any necessary&#13;equipment and additional facility costs necessary to support capacity requirements for the manufacture of ThermoDox&amp;#174;. Celsion&#13;will repay Hisun for the aggregate amount of these development costs and fees commencing on the successful completion of three&#13;registration batches of ThermoDox&amp;#174;. Hisun is also obligated to certain performance requirements under the agreement. The agreement&#13;will initially be limited to a percentage of the production requirements of ThermoDox&amp;#174; in the China territory with Hisun retaining&#13;an option for additional global supply after local regulatory approval in the China territory. In addition, Hisun will collaborate&#13;with Celsion around the regulatory approval activities for ThermoDox&amp;#174; with the China State Food and Drug Administration (the&#13;&amp;#8220;CFDA&amp;#8221;). During the first quarter of 2015, Hisun completed the successful manufacture of three registration batches&#13;of ThermoDox&amp;#174;.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On January 18, 2013, we entered into&#13;a technology development contract with Hisun, pursuant to which Hisun paid us a non-refundable research and development fee of&#13;$5 million to support our development of ThermoDox &lt;sup&gt;&amp;#174;&lt;/sup&gt; the China territory. Following our announcement on January&#13;31, 2013 that the HEAT study failed to meet its primary endpoint, Celsion and Hisun have agreed that the Technology Development&#13;Contract entered into on January 18, 2013 will remain in effect while the parties continue to collaborate and are evaluating the&#13;next steps in relation to ThermoDox &lt;sup&gt;&amp;#174;&lt;/sup&gt; which include the sub-group analysis of patients in the Phase III HEAT Study&#13;for the hepatocellular carcinoma clinical indication and other activities to further the development of ThermoDox &lt;sup&gt;&amp;#174;&lt;/sup&gt;&#13;for the Greater China market. The $5.0 million received as a non-refundable payment from Hisun in the first quarter 2013 has been&#13;recorded to deferred revenue and will continue to be amortized over the 10-year term of the agreement, until such time as the parties&#13;find a mutually acceptable path forward on the development of ThermoDox &lt;sup&gt;&amp;#174;&lt;/sup&gt; based on findings of the ongoing post-study&#13;analysis of the HEAT Study data.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 16.5pt; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On July 19, 2013, the Company and Hisun&#13;entered into a Memorandum of Understanding to pursue ongoing collaborations for the continued clinical development of ThermoDox&amp;#174;&#13;as well as the technology transfer relating to the commercial manufacture of ThermoDox&amp;#174; for the China territory. This expanded&#13;collaboration includes development of the next generation liposomal formulation with the goal of creating safer, more efficacious&#13;versions of marketed cancer chemotherapeutics.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Among the key provisions of the Celsion-Hisun&#13;Memorandum of Understanding are:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="width: 10px; text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 48px; text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;&amp;#9679;&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Hisun will provide the Company with non-dilutive financing and the investment necessary to complete the technology transfer of its proprietary manufacturing process and the production of registration batches for the China territory;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;&amp;#9679;&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Hisun will collaborate with the Company around the clinical and regulatory approval activities for ThermoDox&amp;#174; as well as other liposomal formations with the CFDA; and&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;&amp;#9679;&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Hisun will be granted a right of first offer for a commercial license to ThermoDox&amp;#174; for the sale and distribution of ThermoDox&amp;#174; in the China territory.&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On August 8, 2016, we signed a Technology&#13;Transfer, Manufacturing and Commercial Supply Agreement (&amp;#8220;GEN-1 Agreement&amp;#8221;) with Hisun to pursue an expanded partnership&#13;for the technology transfer relating to the clinical and commercial manufacture and supply of GEN-1, Celsion&amp;#8217;s proprietary&#13;gene mediated, IL-12 immunotherapy, for the China territory, with the option to expand into other countries in the rest of the&#13;world after all necessary regulatory approvals are in effect. The GEN-1 Agreement will help to support supply for both ongoing&#13;and planned clinical studies in the U.S., and for potential future studies of GEN-1 in China. GEN-1 is currently being evaluated&#13;by Celsion in first line ovarian cancer patients.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Key provisions of the GEN-1 Agreement&#13;are as follows:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 18.7pt"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="width: 10px; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 48px; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;&amp;#9679;&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;the GEN-1 Agreement has targeted unit costs for clinical supplies of GEN-1 that are substantially competitive with the Company&amp;#8217;s current suppliers;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;&amp;#9679;&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;once approved, the cost structure for GEN-1 will support rapid market adoption and significant gross margins across global markets;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;&amp;#9679;&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Celsion will provide Hisun a certain percentage of China&amp;#8217;s commercial unit demand, and separately of global commercial unit demand, subject to regulatory approval;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;&amp;#9679;&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Hisun and Celsion will commence technology transfer activities relating to the manufacture of GEN-1, including all studies required by CFDA for site approval; and&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: top"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;&amp;#9679;&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Hisun will collaborate with Celsion around the regulatory approval activities for GEN-1 with the CFDA. A local China partner affords Celsion access to accelerated CFDA review and potential regulatory exclusivity for the approved indication.&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</CLSN:LicensingTransactionTextBlock>
    <us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Assets and liabilities measured at fair&#13;value are summarized below:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Total Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Quoted Prices&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;In Active Markets&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;For Identical Assets/Liabilities (Level&#13;        1)&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Significant Other Observable Inputs&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;(Level 2)&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Significant Unobservable Inputs&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;(Level 3)&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Assets:&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Recurring items as of September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="width: 48%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Investment securities, available for sale&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;18,579,731&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;18,579,731&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Recurring items as of December 31, 2017&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Investment securities, available for sale&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,724,020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,724,020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Liabilities:&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Recurring items as of September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Earn-out milestone liability (Note 13)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;8,970,854&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;8,970,854&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Recurring items as of December 31, 2017&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Earn-out milestone liability (Note 13)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,538,525&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&amp;#9472;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,538,525&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock>
    <us-gaap:ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The following table summarizes the fair&#13;values of these assets acquired and liabilities assumed related to the acquisition.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 82%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Property and equipment, net&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 15%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;35,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;In-process research and development&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;24,211,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Other Intangible assets (Covenant not to compete)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1,591,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Goodwill&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1,976,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Total assets:&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;27,813,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Accounts payable and accrued liabilities&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(235,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Net assets acquired&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;27,578,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</us-gaap:ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock>
    <us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Other accrued liabilities as of September&#13;30, 2018 and December 31, 2017 include the following:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;September 30, 2018&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;December 31, 2017&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 58%; text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Amounts due to contract research organizations and &lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;other contractual agreements&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 18%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;730,811&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 18%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;665,373&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Accrued payroll and related benefits&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1,048,077&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1,258,265&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Accrued professional fees&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;341,240&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;264,668&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Other&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;20,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;94,521&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Total&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2,140,128&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2,282,827&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock>
    <CLSN:ScheduleOfSharebasedCompensationStockOptionsAndRestrictedStockAwardsActivityTableTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;A summary of stock option awards and&#13;restricted stock grants for the nine-months ended September 30, 2018 is presented below:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="7" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Stock Options&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="7" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Restricted Stock Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Weighted&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Average&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Equity Awards&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Options&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Outstanding&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Weighted&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Average&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Exercise&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Price&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Non-vested&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Restricted&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Stock&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Outstanding&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Weighted&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Average&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Grant&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Date&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Fair Value&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Contractual&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Terms of&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Equity&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Awards&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;&#13;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;(in years)&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="3" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 40%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Equity awards outstanding at January 1, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 9%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;703,442&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;10.34&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 9%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 9%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 9%; text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Equity awards granted&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2,629,004&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.26&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;35,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.71&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Vested and issued&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(6,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.64&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Equity awards forfeited, cancelled or expired&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(113,701&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;40.23&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Equity awards outstanding at September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;3,218,745&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.67&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;29,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.72&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9.4&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Aggregate intrinsic value of outstanding equity awards at September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1,384,245&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1,700&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Equity awards exercisable at September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1,677,998&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.94&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9.3&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Aggregate intrinsic value of equity awards exercisable at September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;706,552&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;</CLSN:ScheduleOfSharebasedCompensationStockOptionsAndRestrictedStockAwardsActivityTableTextBlock>
    <us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The Company used the following assumptions&#13;for determining the fair value of options granted under the Black-Scholes option pricing model:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Nine Months Ended September 30,&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2018&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2017&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 66%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Risk-free interest rate&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 14%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.82 &amp;#8211; 3.02&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 14%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.21&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;%&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Expected volatility&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;99.9 -102.1&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;90.4&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;%&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Expected life (in years)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;8.0 - 10.0&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;10.00&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Expected dividend yield&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;%&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock>
    <CLSN:ScheduleOfChangesInEarnOutMilestoneLiabilitiesTableTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The following is a summary of the changes&#13;in the earn-out milestone liability for 2018:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 79%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Balance at January 1, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 18%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,538,525&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Non-cash gain from the adjustment for the change in fair value&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(3,567,671&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Balance at September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;8,970,854&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</CLSN:ScheduleOfChangesInEarnOutMilestoneLiabilitiesTableTextBlock>
    <CLSN:ScheduleOfMilestoneRiskAdjustmentAssessmentTableTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The following is a schedule of the Company&amp;#8217;s&#13;risk-adjustment assessment of each milestone:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Date&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Risk-adjustment Assessment&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;of each Milestone&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Discount Rate&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Estimated Time&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;to Achieve&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 21%; text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 32%; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;0% to 80%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 18%; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 22%; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;0.00 to 1.17 year&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;June 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;35% to 80%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;0.83 to 1.00 years&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;December 31, 2017&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;35% to 80%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1.33 to 1.50 years&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;September 30, 2017&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;35% to 80%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1.25 to 1.75 years&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;June 30, 2017&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;50% to 80%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;1.50 to 2.00 years&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="text-align: justify; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;December 31, 2016&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;50% to 80%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9%&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.00 to 2.50 years&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</CLSN:ScheduleOfMilestoneRiskAdjustmentAssessmentTableTextBlock>
    <CLSN:ScheduleOfCostFairValueAndMaturitiesOfShorttermInvestmentsTableTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;A summary of the cost, fair value and&#13;maturities of the Company&amp;#8217;s short-term investments is as follows:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;September 30, 2018&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;December 31, 2017&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Cost&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Cost&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Short-term investments&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="width: 48%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Certificate of deposit&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;3,128,390&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;3,144,875&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Corporate debt securities&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;15,430,381&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;15,434,856&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,734,184&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,724,020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;18,558,771&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;18,579,731&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,734,184&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,724,020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;September 30, 2018&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;December 31, 2017&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Cost&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Cost&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Short-term investment maturities&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="width: 48%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Within 3 months&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;5,714,421&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;5,724,554&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Between 3-12 months&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,844,350&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,855,177&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,734,184&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,724,020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;18,558,771&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;18,579,731&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,734,184&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,724,020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</CLSN:ScheduleOfCostFairValueAndMaturitiesOfShorttermInvestmentsTableTextBlock>
    <us-gaap:InvestmentIncomeTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Investment income, which includes net&#13;realized losses on sales of available for sale securities and investment income interest and dividends, is summarized as follows:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Three Months Ended&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;September 30,&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2018&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2017&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 62%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Interest and dividends accrued and paid&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 16%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;103,777&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 16%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;524&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Realized gains&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2,788&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Investment income, net&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;106,565&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;524&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Nine Months Ended&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;September 30,&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2018&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;2017&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 62%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Interest and dividends accrued and paid&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 16%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;242,625&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 16%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;3,941&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Realized gains&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;11,125&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Investment income, net&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;253,750&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;3,941&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</us-gaap:InvestmentIncomeTextBlock>
    <us-gaap:ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The following table shows the Company&amp;#8217;s&#13;investment securities gross unrealized gains (losses) and fair value by investment category and length of time that individual&#13;securities have been in a continuous unrealized loss position at September 30, 2018 and December 31, 2017. The Company has reviewed&#13;individual securities to determine whether a decline in fair value below the amortizable cost basis is other than temporary.&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;September 30, 2018&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="6" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;December 31, 2017&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Available for sale securities&lt;/b&gt; (all unrealized holding gains and losses are less than 12 months at date of measurement)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Unrealized&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Holding&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Gains&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;(Losses)&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid; text-align: center; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Fair Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Unrealized&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Holding&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Gains&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;(Losses)&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 48%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Investments with unrealized gains&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;10,845,595&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;27,352&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;748,148&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 10%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;570&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Investments with unrealized losses&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;7,734,136&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(6,392&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;11,975,872&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(10,734&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;18,579,731&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;20,960&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;12,724,020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(10,164&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</us-gaap:ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock>
    <CLSN:CashInvestmentSecuritiesAndInterestReceivable contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">22000000</CLSN:CashInvestmentSecuritiesAndInterestReceivable>
    <CLSN:AggregateOfferingPriceAdditions contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">15000000</CLSN:AggregateOfferingPriceAdditions>
    <CLSN:NumberOfSharesOfCommonStockIssuableUponExerciseOfWarrantsAndEquityAwards contextRef="From2018-01-01to2018-09-30" unitRef="Shares" decimals="INF">6496261</CLSN:NumberOfSharesOfCommonStockIssuableUponExerciseOfWarrantsAndEquityAwards>
    <CLSN:NumberOfSharesOfCommonStockIssuableUponExerciseOfWarrantsAndEquityAwards contextRef="From2017-01-01to2017-09-30" unitRef="Shares" decimals="INF">6208389</CLSN:NumberOfSharesOfCommonStockIssuableUponExerciseOfWarrantsAndEquityAwards>
    <CLSN:NumberOfSharesOfCommonStockIssuableUponExerciseOfWarrantsAndEquityAwards contextRef="From2018-07-01to2018-09-30" unitRef="Shares" decimals="INF">6496261</CLSN:NumberOfSharesOfCommonStockIssuableUponExerciseOfWarrantsAndEquityAwards>
    <CLSN:NumberOfSharesOfCommonStockIssuableUponExerciseOfWarrantsAndEquityAwards contextRef="From2017-04-01to2017-06-30" unitRef="Shares" decimals="INF">6208389</CLSN:NumberOfSharesOfCommonStockIssuableUponExerciseOfWarrantsAndEquityAwards>
    <us-gaap:InvestmentIncomeInterestAndDividend contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">242625</us-gaap:InvestmentIncomeInterestAndDividend>
    <us-gaap:InvestmentIncomeInterestAndDividend contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">3941</us-gaap:InvestmentIncomeInterestAndDividend>
    <us-gaap:InvestmentIncomeInterestAndDividend contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">103777</us-gaap:InvestmentIncomeInterestAndDividend>
    <us-gaap:InvestmentIncomeInterestAndDividend contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">524</us-gaap:InvestmentIncomeInterestAndDividend>
    <us-gaap:RealizedInvestmentGainsLosses contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">11125</us-gaap:RealizedInvestmentGainsLosses>
    <us-gaap:RealizedInvestmentGainsLosses contextRef="From2017-01-01to2017-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:RealizedInvestmentGainsLosses contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">2788</us-gaap:RealizedInvestmentGainsLosses>
    <us-gaap:RealizedInvestmentGainsLosses contextRef="From2017-04-01to2017-06-30" unitRef="USD" xsi:nil="true" />
    <CLSN:DebtSecuritiesAvailableforsaleMaturityAllocatedAndSingleMaturityDateRollingWithinThreeMonthsAmortizedCost contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">5714421</CLSN:DebtSecuritiesAvailableforsaleMaturityAllocatedAndSingleMaturityDateRollingWithinThreeMonthsAmortizedCost>
    <CLSN:DebtSecuritiesAvailableforsaleMaturityAllocatedAndSingleMaturityDateRollingWithinThreeMonthsAmortizedCost contextRef="AsOf2017-12-31" unitRef="USD" xsi:nil="true" />
    <CLSN:DebtSecuritiesAvailableforsaleMaturityAllocatedAndSingleMaturityDateRollingWithinThreeMonthsFairValue contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">5724554</CLSN:DebtSecuritiesAvailableforsaleMaturityAllocatedAndSingleMaturityDateRollingWithinThreeMonthsFairValue>
    <CLSN:DebtSecuritiesAvailableforsaleMaturityAllocatedAndSingleMaturityDateRollingWithinThreeMonthsFairValue contextRef="AsOf2017-12-31" unitRef="USD" xsi:nil="true" />
    <CLSN:DebtSecuritiesAvailableforsaleMaturityAllocatedAndSingleMaturityDateRollingBetweenThreeAndTwelveMonthsAmortizedCost contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">12844350</CLSN:DebtSecuritiesAvailableforsaleMaturityAllocatedAndSingleMaturityDateRollingBetweenThreeAndTwelveMonthsAmortizedCost>
    <CLSN:DebtSecuritiesAvailableforsaleMaturityAllocatedAndSingleMaturityDateRollingBetweenThreeAndTwelveMonthsAmortizedCost contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">12734184</CLSN:DebtSecuritiesAvailableforsaleMaturityAllocatedAndSingleMaturityDateRollingBetweenThreeAndTwelveMonthsAmortizedCost>
    <CLSN:DebtSecuritiesAvailableforsaleMaturityAllocatedAndSingleMaturityDateRollingBetweenThreeAndTwelveMonthsFairValue contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">12855177</CLSN:DebtSecuritiesAvailableforsaleMaturityAllocatedAndSingleMaturityDateRollingBetweenThreeAndTwelveMonthsFairValue>
    <CLSN:DebtSecuritiesAvailableforsaleMaturityAllocatedAndSingleMaturityDateRollingBetweenThreeAndTwelveMonthsFairValue contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">12724020</CLSN:DebtSecuritiesAvailableforsaleMaturityAllocatedAndSingleMaturityDateRollingBetweenThreeAndTwelveMonthsFairValue>
    <us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">18579731</us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate>
    <us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">12724020</us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate>
    <CLSN:AvailableforsaleSecuritiesDebtSecuritiesCurrentAccumulatedUnrealizedGainLoss contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">-20960</CLSN:AvailableforsaleSecuritiesDebtSecuritiesCurrentAccumulatedUnrealizedGainLoss>
    <CLSN:AvailableforsaleSecuritiesDebtSecuritiesCurrentAccumulatedUnrealizedGainLoss contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">-10164</CLSN:AvailableforsaleSecuritiesDebtSecuritiesCurrentAccumulatedUnrealizedGainLoss>
    <CLSN:DebtSecuritiesAvailableforsaleContinuousUnrealizedGainPositionLessThan12Months contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">-10845595</CLSN:DebtSecuritiesAvailableforsaleContinuousUnrealizedGainPositionLessThan12Months>
    <CLSN:DebtSecuritiesAvailableforsaleContinuousUnrealizedGainPositionLessThan12Months contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">-748148</CLSN:DebtSecuritiesAvailableforsaleContinuousUnrealizedGainPositionLessThan12Months>
    <CLSN:DebtSecuritiesAvailableforsaleContinuousUnrealizedGainPositionLessThan12MonthsAccumulatedGain contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">-27352</CLSN:DebtSecuritiesAvailableforsaleContinuousUnrealizedGainPositionLessThan12MonthsAccumulatedGain>
    <CLSN:DebtSecuritiesAvailableforsaleContinuousUnrealizedGainPositionLessThan12MonthsAccumulatedGain contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">-570</CLSN:DebtSecuritiesAvailableforsaleContinuousUnrealizedGainPositionLessThan12MonthsAccumulatedGain>
    <us-gaap:FairValueAssetsLevel1ToLevel2TransfersAmount contextRef="AsOf2018-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:FairValueAssetsLevel1ToLevel2TransfersAmount contextRef="AsOf2017-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3 contextRef="From2018-01-01to2018-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3 contextRef="From2017-01-01to2017-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:BusinessCombinationConsiderationTransferred1 contextRef="From2014-06-01to2014-06-20_custom_EGENIncMember_us-gaap_MaximumMember" unitRef="USD" decimals="0">44400000</us-gaap:BusinessCombinationConsiderationTransferred1>
    <us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh contextRef="AsOf2018-09-30_custom_EGENIncMember_custom_OvarianCancerMember" unitRef="USD" decimals="0">12400000</us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh>
    <us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh contextRef="AsOf2018-09-30_custom_EGENIncMember_custom_GlioblastomaMultiformeBrainCancerMember" unitRef="USD" decimals="0">12000000</us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh>
    <us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh contextRef="AsOf2017-12-31_custom_EGENIncMember" unitRef="USD" decimals="0">24400000</us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh>
    <us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh contextRef="AsOf2014-06-20_custom_EGENIncMember_us-gaap_MaximumMember" unitRef="USD" decimals="0">30400000</us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh>
    <us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh contextRef="AsOf2014-06-20_custom_EGENIncMember" unitRef="USD" decimals="0">30400000</us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh>
    <us-gaap:PaymentsToAcquireBusinessesGross contextRef="From2014-06-01to2014-06-20_custom_EGENIncMember" unitRef="USD" decimals="0">3000000</us-gaap:PaymentsToAcquireBusinessesGross>
    <us-gaap:PaymentsToAcquireBusinessesGross contextRef="From2014-06-01to2014-06-10_custom_EGENIncMember_custom_HerculesCreditAgreementMember" unitRef="USD" decimals="0">3000000</us-gaap:PaymentsToAcquireBusinessesGross>
    <us-gaap:StockIssuedDuringPeriodSharesAcquisitions contextRef="From2014-06-01to2014-06-20_custom_EGENIncMember" unitRef="Shares" decimals="INF">193728</us-gaap:StockIssuedDuringPeriodSharesAcquisitions>
    <us-gaap:BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued contextRef="From2017-06-15to2017-06-16_custom_EGENIncMember" unitRef="Shares" decimals="INF">47862</us-gaap:BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued>
    <us-gaap:IndefinitelivedIntangibleAssetsAcquired contextRef="From2018-01-01to2018-09-30_custom_EGENIncMember_custom_IPRAndDDrugTechnologyPlatformsMember" unitRef="USD" decimals="0">24200000</us-gaap:IndefinitelivedIntangibleAssetsAcquired>
    <us-gaap:AssetImpairmentCharges contextRef="From2017-07-01to2017-09-30_custom_EGENIncMember_custom_GlioblastomaMultiformeBrainCancerMember" unitRef="USD" decimals="0">6900000</us-gaap:AssetImpairmentCharges>
    <us-gaap:AssetImpairmentCharges contextRef="From2016-12-01to2016-12-31_custom_IPRAndDDrugTechnologyPlatformsMember" unitRef="USD" decimals="0">1400000</us-gaap:AssetImpairmentCharges>
    <us-gaap:AssetImpairmentCharges contextRef="From2017-01-01to2017-09-30_custom_EGENIncMember_custom_GlioblastomaMultiformeBrainCancerMember" unitRef="USD" decimals="0">9400000</us-gaap:AssetImpairmentCharges>
    <us-gaap:AssetImpairmentCharges contextRef="From2017-07-01to2017-09-30" unitRef="USD" decimals="0">2500000</us-gaap:AssetImpairmentCharges>
    <us-gaap:AssetImpairmentCharges contextRef="From2016-10-01to2016-12-31_custom_IPRAndDDrugTechnologyPlatformsMember" unitRef="USD" decimals="0">1400000</us-gaap:AssetImpairmentCharges>
    <us-gaap:FiniteLivedIntangibleAssetUsefulLife contextRef="From2018-01-01to2018-09-30_custom_EGENIncMember_custom_PurchaseAgreementMember">P7Y</us-gaap:FiniteLivedIntangibleAssetUsefulLife>
    <us-gaap:FinitelivedIntangibleAssetsAcquired1 contextRef="From2018-01-01to2018-09-30_custom_EGENIncMember_custom_PurchaseAgreementMember" unitRef="USD" decimals="0">1600000</us-gaap:FinitelivedIntangibleAssetsAcquired1>
    <us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization contextRef="AsOf2018-09-30_custom_PurchaseAgreementMember" unitRef="USD" decimals="0">966093</us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization>
    <us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization contextRef="AsOf2017-12-31_custom_PurchaseAgreementMember" unitRef="USD" decimals="0">795606</us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization>
    <us-gaap:ContractualObligation contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">730811</us-gaap:ContractualObligation>
    <us-gaap:ContractualObligation contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">665373</us-gaap:ContractualObligation>
    <us-gaap:ContractualObligation contextRef="AsOf2012-04-30_us-gaap_StandbyLettersOfCreditMember_custom_LawrencevilleNewJerseyMember" unitRef="USD" decimals="0">250000</us-gaap:ContractualObligation>
    <us-gaap:EmployeeRelatedLiabilitiesCurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">1048077</us-gaap:EmployeeRelatedLiabilitiesCurrent>
    <us-gaap:EmployeeRelatedLiabilitiesCurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">1258265</us-gaap:EmployeeRelatedLiabilitiesCurrent>
    <us-gaap:AccruedProfessionalFeesCurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">341240</us-gaap:AccruedProfessionalFeesCurrent>
    <us-gaap:AccruedProfessionalFeesCurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">264668</us-gaap:AccruedProfessionalFeesCurrent>
    <us-gaap:OtherAccruedLiabilitiesCurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">20000</us-gaap:OtherAccruedLiabilitiesCurrent>
    <us-gaap:OtherAccruedLiabilitiesCurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">94521</us-gaap:OtherAccruedLiabilitiesCurrent>
    <us-gaap:ProceedsFromLinesOfCredit contextRef="From2014-06-01to2014-06-10_custom_HerculesCreditAgreementMember_custom_SecondTrancheMember" unitRef="USD" decimals="0">5000000</us-gaap:ProceedsFromLinesOfCredit>
    <us-gaap:ProceedsFromLinesOfCredit contextRef="From2013-12-01to2014-06-10_custom_HerculesMember_custom_HerculesCreditAgreementMember" unitRef="USD" decimals="0">10000000</us-gaap:ProceedsFromLinesOfCredit>
    <us-gaap:ProceedsFromLinesOfCredit contextRef="From2013-11-11to2013-11-30_custom_HerculesCreditAgreementMember_custom_FirstTrancheMember" unitRef="USD" decimals="0">5000000</us-gaap:ProceedsFromLinesOfCredit>
    <us-gaap:ProceedsFromLinesOfCredit contextRef="From2018-06-26to2018-06-27_custom_HorizonCreditAgreementMember" unitRef="USD" decimals="0">10000000</us-gaap:ProceedsFromLinesOfCredit>
    <us-gaap:DeferredFinanceCostsNet contextRef="AsOf2013-11-30_custom_HerculesMember_custom_HerculesCreditAgreementMember" unitRef="USD" decimals="0">122378</us-gaap:DeferredFinanceCostsNet>
    <us-gaap:DeferredFinanceCostsNet contextRef="AsOf2018-09-30_custom_HorizonMember_custom_HorizonCreditAgreementMember" unitRef="USD" decimals="0">175000</us-gaap:DeferredFinanceCostsNet>
    <us-gaap:DebtInstrumentUnamortizedDiscount contextRef="AsOf2014-06-10_custom_HerculesWarrantMember" unitRef="USD" decimals="0">476261</us-gaap:DebtInstrumentUnamortizedDiscount>
    <us-gaap:DebtInstrumentUnamortizedDiscount contextRef="AsOf2013-11-30_custom_HerculesMember_custom_HerculesCreditAgreementMember" unitRef="USD" decimals="0">230000</us-gaap:DebtInstrumentUnamortizedDiscount>
    <us-gaap:DebtInstrumentUnamortizedDiscount contextRef="AsOf2018-09-30_custom_HorizonWarrantMember_custom_HorizonCreditAgreementMember" unitRef="USD" decimals="0">507116</us-gaap:DebtInstrumentUnamortizedDiscount>
    <us-gaap:DebtInstrumentUnamortizedDiscount contextRef="AsOf2018-09-30_custom_HorizonMember_custom_HorizonCreditAgreementMember" unitRef="USD" decimals="0">100000</us-gaap:DebtInstrumentUnamortizedDiscount>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight contextRef="AsOf2013-11-25_custom_HerculesWarrantMember_custom_HerculesCreditAgreementMember" unitRef="Shares" decimals="INF">6963</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight contextRef="AsOf2014-06-10_custom_HerculesCreditAgreementMember_custom_SecondTrancheMember" unitRef="Shares" decimals="INF">6963</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight contextRef="AsOf2017-10-27_custom_UnderwritingAgreementMember_custom_OppenheimerAndCoIncMember_custom_InvestorWarrantMember" unitRef="Shares" decimals="INF">2.50</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight contextRef="AsOf2017-10-27_us-gaap_WarrantMember" unitRef="Shares" decimals="INF">2.325</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight contextRef="AsOf2017-10-27_custom_October2017UnderwrittenOfferingMember_custom_InvestorWarrantMember" unitRef="Shares" decimals="INF">2.87</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight contextRef="AsOf2017-10-04_custom_July2017DirectOfferingMember" unitRef="Shares" decimals="INF">4665000</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight contextRef="AsOf2017-10-04_custom_SeriesDDDWarrantsMember_custom_July2017DirectOfferingMember" unitRef="Shares" decimals="INF">1</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight contextRef="AsOf2018-09-30_custom_HorizonWarrantMember_custom_HorizonCreditAgreementMember" unitRef="Shares" decimals="INF">190114</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2017-06-26" unitRef="USDPShares" decimals="INF">1.65</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2017-06-09_us-gaap_WarrantMember_srt_MaximumMember" unitRef="USDPShares" decimals="INF">2.70</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2013-11-25_custom_HerculesWarrantMember_custom_HerculesCreditAgreementMember" unitRef="USDPShares" decimals="INF">50.26</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2017-07-06_custom_PreFundedSeriesCCCWarrantsMember_custom_July2017DirectOfferingMember" unitRef="USDPShares" decimals="INF">0.01</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2017-07-06_custom_SeriesAAAWarrantsMember_custom_July2017DirectOfferingMember" unitRef="USDPShares" decimals="INF">2.07</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2017-07-06_custom_SeriesBBBWarrantsMember_custom_July2017DirectOfferingMember" unitRef="USDPShares" decimals="INF">4.75</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2017-10-04_custom_July2017DirectOfferingMember_custom_SeriesAAAWarrantsMember" unitRef="USDPShares" decimals="INF">2.07</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2017-10-04_custom_July2017DirectOfferingMember_custom_SeriesBBBWarrantsMember" unitRef="USDPShares" decimals="INF">4.75</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2017-10-04_custom_SeriesDDDWarrantsMember_custom_July2017DirectOfferingMember" unitRef="USDPShares" decimals="INF">6.20</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2017-02-14_custom_SeriesAAWarrantMember_custom_February142017PublicOfferingMember" unitRef="USDPShares" decimals="INF">3.22</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2017-02-14_custom_PreFundedSeriesBBWarrantMember_custom_February142017PublicOfferingMember" unitRef="USDPShares" decimals="INF">0.14</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2013-02-22_srt_MaximumMember_us-gaap_WarrantMember" unitRef="USDPShares" decimals="INF">74.34</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2014-01-15_us-gaap_WarrantMember_srt_MaximumMember" unitRef="USDPShares" decimals="INF">57.40</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2015-05-27_custom_TwoThousandFifteenWarrantsMember_custom_May2015CommonStockOfferingMember" unitRef="USDPShares" decimals="INF">36.40</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2018-09-30_custom_HorizonWarrantMember_custom_HorizonCreditAgreementMember" unitRef="USDPShares" decimals="INF">2.63</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 contextRef="AsOf2018-09-30_custom_OctoberTwentynineTwoThousandEighteenMember100073798" unitRef="USDPShares" decimals="INF">5.75</us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1>
    <us-gaap:DeferredFinanceCostsGross contextRef="AsOf2014-06-10_custom_HerculesWarrantMember_custom_HerculesCreditAgreementMember" unitRef="USD" decimals="0">350000</us-gaap:DeferredFinanceCostsGross>
    <us-gaap:DeferredFinanceCostsGross contextRef="AsOf2018-09-30_custom_HorizonWarrantMember_custom_HorizonCreditAgreementMember" unitRef="USD" decimals="0">400000</us-gaap:DeferredFinanceCostsGross>
    <us-gaap:DeferredFinanceCostsGross contextRef="AsOf2018-09-30_custom_HorizonMember_custom_HorizonCreditAgreementMember" unitRef="USD" decimals="0">782116</us-gaap:DeferredFinanceCostsGross>
    <us-gaap:InterestExpenseDebt contextRef="From2018-01-01to2018-09-30_custom_HorizonCreditAgreementMember" unitRef="USD" decimals="0">259064</us-gaap:InterestExpenseDebt>
    <us-gaap:InterestExpenseDebt contextRef="From2018-01-01to2018-09-30_custom_HerculesCreditAgreementMember" unitRef="USD" decimals="0">56386</us-gaap:InterestExpenseDebt>
    <us-gaap:InterestExpenseDebt contextRef="From2018-07-01to2018-09-30_custom_HorizonCreditAgreementMember" unitRef="USD" decimals="0">248270</us-gaap:InterestExpenseDebt>
    <us-gaap:InterestExpenseDebt contextRef="From2017-07-01to2017-09-30_custom_HerculesCreditAgreementMember" unitRef="USD" xsi:nil="true" />
    <us-gaap:AmortizationOfFinancingCosts contextRef="From2018-01-01to2018-09-30_custom_HorizonCreditAgreementMember" unitRef="USD" decimals="0">101695</us-gaap:AmortizationOfFinancingCosts>
    <us-gaap:AmortizationOfFinancingCosts contextRef="From2018-01-01to2018-09-30_custom_HerculesCreditAgreementMember" unitRef="USD" decimals="0">35370</us-gaap:AmortizationOfFinancingCosts>
    <us-gaap:AmortizationOfFinancingCosts contextRef="From2018-07-01to2018-09-30_custom_HorizonCreditAgreementMember" unitRef="USD" decimals="0">97458</us-gaap:AmortizationOfFinancingCosts>
    <us-gaap:AmortizationOfFinancingCosts contextRef="From2017-07-01to2017-09-30_custom_HerculesCreditAgreementMember" unitRef="USD" xsi:nil="true" />
    <us-gaap:AdjustmentForAmortization contextRef="From2018-01-01to2018-09-30_custom_EGENIncMember_custom_PurchaseAgreementMember" unitRef="USD" decimals="0">56829</us-gaap:AdjustmentForAmortization>
    <us-gaap:AdjustmentForAmortization contextRef="From2017-01-01to2017-09-30_custom_EGENIncMember_custom_PurchaseAgreementMember" unitRef="USD" decimals="0">170487</us-gaap:AdjustmentForAmortization>
    <us-gaap:AdjustmentForAmortization contextRef="From2018-07-01to2018-09-30_custom_EGENIncMember_custom_PurchaseAgreementMember" unitRef="USD" decimals="0">56829</us-gaap:AdjustmentForAmortization>
    <us-gaap:AdjustmentForAmortization contextRef="From2017-07-01to2017-09-30_custom_EGENIncMember_custom_PurchaseAgreementMember" unitRef="USD" decimals="0">170487</us-gaap:AdjustmentForAmortization>
    <us-gaap:GoodwillAcquiredDuringPeriod contextRef="From2018-01-01to2018-09-30_custom_EGENIncMember" unitRef="USD" decimals="0">2000000</us-gaap:GoodwillAcquiredDuringPeriod>
    <us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity contextRef="AsOf2013-11-30_custom_LoanAgreementMember_custom_HerculesTechnologyGrowthCapitalIncMember" unitRef="USD" decimals="0">20000000</us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity>
    <us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity contextRef="AsOf2018-06-27_custom_LoanAgreementMember_custom_HorizonTechnologyFinanceCorporationMember" unitRef="USD" decimals="0">10000000</us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity>
    <us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">7734136</us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months>
    <us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">11975872</us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months>
    <us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod contextRef="From2018-01-01to2018-09-30_us-gaap_EmployeeStockOptionMember">P10Y</us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized contextRef="AsOf2018-09-30_custom_TwoThousandAndSevenStockIncentivePlanMember" unitRef="Shares" decimals="INF">688531</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized contextRef="AsOf2018-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember" unitRef="Shares" decimals="INF">2700000</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized>
    <CLSN:PercentageOfFairMarketValueOfShares contextRef="AsOf2018-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember_srt_MinimumMember" unitRef="Percentage" decimals="INF">1.10</CLSN:PercentageOfFairMarketValueOfShares>
    <CLSN:PercentageOfFairMarketValueOfShares contextRef="AsOf2018-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember" unitRef="Percentage" decimals="INF">1.00</CLSN:PercentageOfFairMarketValueOfShares>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod contextRef="From2018-01-01to2018-09-30_custom_EquityStockAwardsMember" unitRef="Shares" decimals="INF">3064741</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod contextRef="From2018-09-01to2018-09-30_custom_InducementOptionGrantsMember_custom_ThreeNewEmployeesMember" unitRef="Shares" decimals="INF">183004</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod>
    <us-gaap:AllocatedShareBasedCompensationExpense contextRef="From2018-01-01to2018-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember" unitRef="USD" decimals="0">3985829</us-gaap:AllocatedShareBasedCompensationExpense>
    <us-gaap:AllocatedShareBasedCompensationExpense contextRef="From2017-01-01to2017-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember" unitRef="USD" decimals="0">951488</us-gaap:AllocatedShareBasedCompensationExpense>
    <us-gaap:AllocatedShareBasedCompensationExpense contextRef="From2018-07-01to2018-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember" unitRef="USD" decimals="0">614528</us-gaap:AllocatedShareBasedCompensationExpense>
    <us-gaap:AllocatedShareBasedCompensationExpense contextRef="From2017-07-01to2017-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember" unitRef="USD" decimals="0">146896</us-gaap:AllocatedShareBasedCompensationExpense>
    <us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized contextRef="AsOf2018-09-30_custom_TwoThousandAndSevenStockIncentivePlanMember" unitRef="USD" decimals="0">2700000</us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized>
    <us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1 contextRef="From2018-01-01to2018-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember">P1Y1M6D</us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue contextRef="From2018-01-01to2018-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember" unitRef="USDPShares" decimals="INF">2.36</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue contextRef="From2017-01-01to2017-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember" unitRef="USDPShares" decimals="INF">2.69</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue>
    <us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 contextRef="From2015-12-18to2016-12-15_custom_HerculesCreditAgreementMember_us-gaap_PrimeRateMember" unitRef="Percentage" decimals="INF">0.1150</us-gaap:DebtInstrumentBasisSpreadOnVariableRate1>
    <us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 contextRef="From2013-11-01to2015-12-17_custom_HerculesCreditAgreementMember_us-gaap_PrimeRateMember" unitRef="Percentage" decimals="INF">0.1125</us-gaap:DebtInstrumentBasisSpreadOnVariableRate1>
    <us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 contextRef="From2017-03-16to2018-09-30_custom_HerculesCreditAgreementMember_us-gaap_PrimeRateMember" unitRef="Percentage" decimals="INF">0.1175</us-gaap:DebtInstrumentBasisSpreadOnVariableRate1>
    <CLSN:WarrantDate contextRef="From2013-11-24to2013-11-25_custom_HerculesWarrantMember_custom_HerculesCreditAgreementMember">2018-11-25</CLSN:WarrantDate>
    <us-gaap:DebtConversionOriginalDebtAmount1 contextRef="From2014-06-09to2014-06-10_custom_HerculesCreditAgreementMember_custom_SecondTrancheMember" unitRef="USD" decimals="0">5000000</us-gaap:DebtConversionOriginalDebtAmount1>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber contextRef="AsOf2018-09-30_custom_EquityStockAwardsMember" unitRef="Shares" decimals="INF">3399893</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber contextRef="AsOf2017-12-31_us-gaap_EmployeeStockOptionMember" unitRef="Shares" decimals="INF">703442</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber contextRef="AsOf2018-09-30_us-gaap_EmployeeStockOptionMember" unitRef="Shares" decimals="INF">3218745</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber contextRef="AsOf2017-05-16" unitRef="Shares" decimals="INF">200000</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber contextRef="AsOf2017-05-16_us-gaap_WarrantMember" unitRef="Shares" decimals="INF">2400000</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant contextRef="AsOf2018-09-30_custom_EquityStockAwardsMember" unitRef="Shares" decimals="INF">335152</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod contextRef="From2018-01-01to2018-09-30_us-gaap_EmployeeStockOptionMember" unitRef="Shares" decimals="INF">2629004</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod>
    <us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares contextRef="From2018-01-01to2018-09-30_us-gaap_EmployeeStockOptionMember" unitRef="Shares" xsi:nil="true" />
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod contextRef="From2018-01-01to2018-09-30_us-gaap_EmployeeStockOptionMember" unitRef="Shares" decimals="INF">113701</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue contextRef="AsOf2018-09-30_us-gaap_EmployeeStockOptionMember" unitRef="USD" decimals="0">1384245</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber contextRef="AsOf2018-09-30_us-gaap_EmployeeStockOptionMember" unitRef="Shares" decimals="INF">1677998</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber>
    <us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 contextRef="AsOf2018-09-30_us-gaap_EmployeeStockOptionMember" unitRef="USD" decimals="0">706552</us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice contextRef="AsOf2017-12-31_us-gaap_EmployeeStockOptionMember" unitRef="USDPShares" decimals="INF">10.34</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice contextRef="AsOf2018-09-30_us-gaap_EmployeeStockOptionMember" unitRef="USDPShares" decimals="INF">2.67</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice>
    <us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice contextRef="From2018-01-01to2018-09-30_us-gaap_EmployeeStockOptionMember" unitRef="USDPShares" decimals="INF">2.26</us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice>
    <us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice contextRef="From2018-09-27to2018-09-28_custom_InducementOptionGrantsMember_custom_ThreeNewEmployeesMember" unitRef="USDPShares" decimals="INF">2.77</us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice>
    <us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue contextRef="From2018-01-01to2018-09-30_us-gaap_EmployeeStockOptionMember" unitRef="USDPShares" xsi:nil="true" />
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice contextRef="From2018-01-01to2018-09-30_us-gaap_EmployeeStockOptionMember" unitRef="USDPShares" decimals="INF">40.23</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice contextRef="AsOf2018-09-30_us-gaap_EmployeeStockOptionMember" unitRef="USDPShares" decimals="INF">2.94</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber contextRef="AsOf2017-12-31_us-gaap_RestrictedStockMember" unitRef="Shares" xsi:nil="true" />
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber contextRef="AsOf2018-09-30_us-gaap_RestrictedStockMember" unitRef="Shares" decimals="INF">29000</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod contextRef="From2018-01-01to2018-09-30_us-gaap_RestrictedStockMember" unitRef="Shares" decimals="INF">35000</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod contextRef="From2018-01-01to2018-09-30_us-gaap_RestrictedStockMember" unitRef="Shares" xsi:nil="true" />
    <us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding contextRef="AsOf2018-09-30_us-gaap_RestrictedStockMember" unitRef="USD" decimals="0">1700</us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue contextRef="AsOf2017-12-31_us-gaap_RestrictedStockMember" unitRef="USDPShares" xsi:nil="true" />
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue contextRef="AsOf2018-09-30_us-gaap_RestrictedStockMember" unitRef="USDPShares" decimals="INF">2.72</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue contextRef="From2018-01-01to2018-09-30_us-gaap_RestrictedStockMember" unitRef="USDPShares" decimals="INF">2.71</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue contextRef="From2018-01-01to2018-09-30_us-gaap_RestrictedStockMember" unitRef="USDPShares" decimals="INF">2.64</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue contextRef="From2018-01-01to2018-09-30_us-gaap_RestrictedStockMember" unitRef="USDPShares" xsi:nil="true" />
    <us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2 contextRef="From2018-01-01to2018-09-30">P9Y4M24D</us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2>
    <us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1 contextRef="From2018-01-01to2018-09-30">P9Y3M19D</us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate contextRef="From2017-01-01to2017-09-30" unitRef="Percentage" decimals="INF">0.0221</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate contextRef="From2018-01-01to2018-09-30_srt_MinimumMember" unitRef="Percentage" decimals="INF">0.0282</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate contextRef="From2018-01-01to2018-09-30_srt_MaximumMember" unitRef="Percentage" decimals="INF">0.0302</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate contextRef="From2017-01-01to2017-09-30" unitRef="Percentage" decimals="INF">0.904</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate contextRef="From2018-01-01to2018-09-30_srt_MinimumMember" unitRef="Percentage" decimals="INF">0.999</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate contextRef="From2018-01-01to2018-09-30_srt_MaximumMember" unitRef="Percentage" decimals="INF">1.021</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate>
    <us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1 contextRef="From2017-01-01to2017-09-30">P10Y</us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1>
    <us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1 contextRef="From2018-01-01to2018-09-30_srt_MinimumMember">P8Y0M0D</us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1>
    <us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1 contextRef="From2018-01-01to2018-09-30_srt_MaximumMember">P10Y</us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate contextRef="From2018-01-01to2018-09-30" unitRef="Percentage" decimals="INF">0.00</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate contextRef="From2017-01-01to2017-09-30" unitRef="Percentage" decimals="INF">0.00</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate>
    <us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred contextRef="From2017-07-01to2017-09-30" unitRef="USD" decimals="0">12500000</us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred>
    <us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred contextRef="From2018-01-01to2018-09-30_custom_EGENIncMember" unitRef="USD" decimals="0">9000000</us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred>
    <us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred contextRef="From2014-06-19to2014-06-20_custom_EGENIncMember" unitRef="USD" decimals="0">13900000</us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred>
    <us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred contextRef="From2017-01-01to2017-12-31_custom_EGENIncMember" unitRef="USD" decimals="0">12500000</us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred>
    <us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred contextRef="From2017-01-01to2017-09-30_custom_EGENIncMember" unitRef="USD" decimals="0">12500000</us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred>
    <us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred contextRef="From2016-01-01to2016-12-31_custom_EGENIncMember" unitRef="USD" decimals="0">13200000</us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred>
    <us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">9000000</us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred>
    <us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">13800000</us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred>
    <us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred contextRef="From2018-04-01to2018-06-30" unitRef="USD" decimals="0">13100000</us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred>
    <us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred contextRef="From2018-04-01to2018-06-30_custom_EGENIncMember" unitRef="USD" decimals="0">13100000</us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred>
    <us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred contextRef="From2017-04-01to2017-06-30_custom_EGENIncMember" unitRef="USD" decimals="0">13800000</us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred>
    <CLSN:RiskAdjustedAssessmentOfEachMilestone contextRef="AsOf2014-06-20_custom_EGENIncMember_us-gaap_MaximumMember" unitRef="Percentage" decimals="INF">0.67</CLSN:RiskAdjustedAssessmentOfEachMilestone>
    <CLSN:RiskAdjustedAssessmentOfEachMilestone contextRef="AsOf2014-06-20_custom_EGENIncMember_srt_MinimumMember" unitRef="Percentage" decimals="INF">0.10</CLSN:RiskAdjustedAssessmentOfEachMilestone>
    <CLSN:RiskAdjustedAssessmentOfEachMilestone contextRef="AsOf2018-09-30_srt_MinimumMember" unitRef="Percentage" decimals="INF">0.00</CLSN:RiskAdjustedAssessmentOfEachMilestone>
    <CLSN:RiskAdjustedAssessmentOfEachMilestone contextRef="AsOf2017-12-31_srt_MinimumMember" unitRef="Percentage" decimals="INF">0.35</CLSN:RiskAdjustedAssessmentOfEachMilestone>
    <CLSN:RiskAdjustedAssessmentOfEachMilestone contextRef="AsOf2017-09-30_srt_MinimumMember" unitRef="Percentage" decimals="INF">0.35</CLSN:RiskAdjustedAssessmentOfEachMilestone>
    <CLSN:RiskAdjustedAssessmentOfEachMilestone contextRef="AsOf2016-12-31_srt_MinimumMember" unitRef="Percentage" decimals="INF">0.50</CLSN:RiskAdjustedAssessmentOfEachMilestone>
    <CLSN:RiskAdjustedAssessmentOfEachMilestone contextRef="AsOf2018-09-30_srt_MaximumMember" unitRef="Percentage" decimals="INF">0.80</CLSN:RiskAdjustedAssessmentOfEachMilestone>
    <CLSN:RiskAdjustedAssessmentOfEachMilestone contextRef="AsOf2017-12-31_srt_MaximumMember" unitRef="Percentage" decimals="INF">0.80</CLSN:RiskAdjustedAssessmentOfEachMilestone>
    <CLSN:RiskAdjustedAssessmentOfEachMilestone contextRef="AsOf2017-09-30_srt_MaximumMember" unitRef="Percentage" decimals="INF">0.80</CLSN:RiskAdjustedAssessmentOfEachMilestone>
    <CLSN:RiskAdjustedAssessmentOfEachMilestone contextRef="AsOf2016-12-31_srt_MaximumMember" unitRef="Percentage" decimals="INF">0.80</CLSN:RiskAdjustedAssessmentOfEachMilestone>
    <CLSN:RiskAdjustedAssessmentOfEachMilestone contextRef="AsOf2018-06-30_srt_MinimumMember" unitRef="Percentage" decimals="INF">0.35</CLSN:RiskAdjustedAssessmentOfEachMilestone>
    <CLSN:RiskAdjustedAssessmentOfEachMilestone contextRef="AsOf2018-06-30_srt_MaximumMember" unitRef="Percentage" decimals="INF">0.80</CLSN:RiskAdjustedAssessmentOfEachMilestone>
    <CLSN:RiskAdjustedAssessmentOfEachMilestone contextRef="AsOf2017-06-30_srt_MinimumMember" unitRef="Percentage" decimals="INF">0.50</CLSN:RiskAdjustedAssessmentOfEachMilestone>
    <CLSN:RiskAdjustedAssessmentOfEachMilestone contextRef="AsOf2017-06-30_srt_MaximumMember" unitRef="Percentage" decimals="INF">0.80</CLSN:RiskAdjustedAssessmentOfEachMilestone>
    <CLSN:EstimatedTimeToAchieveTheMilestone contextRef="From2014-06-19to2014-06-20_custom_EGENIncMember_srt_MinimumMember">P1Y6M</CLSN:EstimatedTimeToAchieveTheMilestone>
    <CLSN:EstimatedTimeToAchieveTheMilestone contextRef="From2014-06-19to2014-06-20_custom_EGENIncMember_srt_MaximumMember">P2Y6M</CLSN:EstimatedTimeToAchieveTheMilestone>
    <CLSN:EstimatedTimeToAchieveTheMilestone contextRef="From2018-01-01to2018-09-30_srt_MinimumMember">P0Y0M0D</CLSN:EstimatedTimeToAchieveTheMilestone>
    <CLSN:EstimatedTimeToAchieveTheMilestone contextRef="From2017-01-01to2017-12-31_srt_MinimumMember">P1Y3M29D</CLSN:EstimatedTimeToAchieveTheMilestone>
    <CLSN:EstimatedTimeToAchieveTheMilestone contextRef="From2017-01-01to2017-09-30_srt_MinimumMember">P1Y2M30D</CLSN:EstimatedTimeToAchieveTheMilestone>
    <CLSN:EstimatedTimeToAchieveTheMilestone contextRef="From2016-01-01to2016-12-31_srt_MinimumMember">P2Y</CLSN:EstimatedTimeToAchieveTheMilestone>
    <CLSN:EstimatedTimeToAchieveTheMilestone contextRef="From2018-01-01to2018-09-30_srt_MaximumMember">P1Y2M1D</CLSN:EstimatedTimeToAchieveTheMilestone>
    <CLSN:EstimatedTimeToAchieveTheMilestone contextRef="From2017-01-01to2017-12-31_srt_MaximumMember">P1Y6M</CLSN:EstimatedTimeToAchieveTheMilestone>
    <CLSN:EstimatedTimeToAchieveTheMilestone contextRef="From2017-01-01to2017-09-30_srt_MaximumMember">P1Y9M0D</CLSN:EstimatedTimeToAchieveTheMilestone>
    <CLSN:EstimatedTimeToAchieveTheMilestone contextRef="From2016-01-01to2016-12-31_srt_MaximumMember">P2Y6M</CLSN:EstimatedTimeToAchieveTheMilestone>
    <CLSN:EstimatedTimeToAchieveTheMilestone contextRef="From2018-04-01to2018-06-30_srt_MinimumMember">P0Y9M29D</CLSN:EstimatedTimeToAchieveTheMilestone>
    <CLSN:EstimatedTimeToAchieveTheMilestone contextRef="From2018-04-01to2018-06-30_srt_MaximumMember">P1Y0M0D</CLSN:EstimatedTimeToAchieveTheMilestone>
    <CLSN:EstimatedTimeToAchieveTheMilestone contextRef="From2017-04-01to2017-06-30_srt_MinimumMember">P1Y6M</CLSN:EstimatedTimeToAchieveTheMilestone>
    <CLSN:EstimatedTimeToAchieveTheMilestone contextRef="From2017-04-01to2017-06-30_srt_MaximumMember">P2Y</CLSN:EstimatedTimeToAchieveTheMilestone>
    <CLSN:EarnoutMilestoneLiability contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">8970854</CLSN:EarnoutMilestoneLiability>
    <CLSN:EarnoutMilestoneLiability contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">12538525</CLSN:EarnoutMilestoneLiability>
    <CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">-3567671</CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability>
    <CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability contextRef="From2017-07-01to2017-09-30" unitRef="USD" decimals="0">1300000</CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability>
    <CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability contextRef="From2018-01-01to2018-09-30_custom_EGENIncMember" unitRef="USD" decimals="0">3567671</CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability>
    <CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability contextRef="From2017-01-01to2017-09-30_custom_EGENIncMember" unitRef="USD" decimals="0">670172</CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability>
    <CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">4100000</CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability>
    <CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability contextRef="From2018-07-01to2018-09-30_custom_EGENIncMember_custom_PurchaseAgreementMember" unitRef="USD" decimals="0">4500000</CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability>
    <CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability contextRef="From2018-07-01to2018-09-30_custom_EGENIncMember" unitRef="USD" decimals="0">4114995</CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability>
    <CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability contextRef="From2017-07-01to2017-09-30_custom_EGENIncMember" unitRef="USD" decimals="0">1246151</CLSN:GainLossFromChangeInFairValueOfEarnOutMilestoneLiability>
    <CLSN:BusinessCombinationContingentConsiderationLiabilityDiscountRate contextRef="AsOf2018-09-30" unitRef="Percentage" decimals="INF">0.09</CLSN:BusinessCombinationContingentConsiderationLiabilityDiscountRate>
    <CLSN:BusinessCombinationContingentConsiderationLiabilityDiscountRate contextRef="AsOf2017-12-31" unitRef="Percentage" decimals="INF">0.09</CLSN:BusinessCombinationContingentConsiderationLiabilityDiscountRate>
    <CLSN:BusinessCombinationContingentConsiderationLiabilityDiscountRate contextRef="AsOf2016-12-31" unitRef="Percentage" decimals="INF">0.09</CLSN:BusinessCombinationContingentConsiderationLiabilityDiscountRate>
    <CLSN:BusinessCombinationContingentConsiderationLiabilityDiscountRate contextRef="AsOf2017-09-30" unitRef="Percentage" decimals="INF">0.09</CLSN:BusinessCombinationContingentConsiderationLiabilityDiscountRate>
    <CLSN:BusinessCombinationContingentConsiderationLiabilityDiscountRate contextRef="AsOf2018-06-30" unitRef="Percentage" decimals="INF">0.09</CLSN:BusinessCombinationContingentConsiderationLiabilityDiscountRate>
    <CLSN:BusinessCombinationContingentConsiderationLiabilityDiscountRate contextRef="AsOf2017-06-30" unitRef="Percentage" decimals="INF">0.09</CLSN:BusinessCombinationContingentConsiderationLiabilityDiscountRate>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod contextRef="From2018-01-01to2018-09-30_us-gaap_RestrictedStockMember" unitRef="Shares" decimals="INF">6000</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod>
    <us-gaap:AreaOfRealEstateProperty contextRef="AsOf2011-07-31_custom_LawrencevilleNewJerseyMember" unitRef="Sqft" decimals="INF">10870</us-gaap:AreaOfRealEstateProperty>
    <us-gaap:AreaOfRealEstateProperty contextRef="AsOf2017-04-30_custom_LawrencevilleNewJerseyMember" unitRef="Sqft" decimals="INF">7565</us-gaap:AreaOfRealEstateProperty>
    <us-gaap:AreaOfRealEstateProperty contextRef="AsOf2014-09-30_custom_EGENAssetPurchaseAgreementMember_custom_HuntsvilleAlabamaMember" unitRef="Sqft" decimals="INF">11500</us-gaap:AreaOfRealEstateProperty>
    <us-gaap:AreaOfRealEstateProperty contextRef="AsOf2018-01-31_custom_EGENAssetPurchaseAgreementMember_custom_HuntsvilleAlabamaMember" unitRef="Sqft" decimals="INF">9049</us-gaap:AreaOfRealEstateProperty>
    <us-gaap:LesseeOperatingLeaseTermOfContract contextRef="AsOf2011-07-31_custom_LawrencevilleNewJerseyMember">P66M</us-gaap:LesseeOperatingLeaseTermOfContract>
    <us-gaap:LesseeOperatingLeaseTermOfContract contextRef="AsOf2017-04-30_custom_LawrencevilleNewJerseyMember">P64M</us-gaap:LesseeOperatingLeaseTermOfContract>
    <us-gaap:LesseeOperatingLeaseTermOfContract contextRef="AsOf2018-01-31_custom_EGENAssetPurchaseAgreementMember_custom_HuntsvilleAlabamaMember">P60M</us-gaap:LesseeOperatingLeaseTermOfContract>
    <CLSN:NumberOfMonthsInWhichFreeRentIsProvided contextRef="From2011-07-01to2011-07-31_custom_LawrencevilleNewJerseyMember">P6M</CLSN:NumberOfMonthsInWhichFreeRentIsProvided>
    <CLSN:NumberOfMonthsInWhichFreeRentIsProvided contextRef="From2017-04-01to2017-04-30_custom_LawrencevilleNewJerseyMember">P4M</CLSN:NumberOfMonthsInWhichFreeRentIsProvided>
    <us-gaap:PaymentsForRent contextRef="From2012-04-01to2012-04-30_custom_LawrencevilleNewJerseyMember" unitRef="USD" decimals="0">23000</us-gaap:PaymentsForRent>
    <CLSN:ContractualObligationReductionNineteenMonthsFromInitialTerm contextRef="AsOf2012-04-30_us-gaap_StandbyLettersOfCreditMember" unitRef="USD" decimals="0">50000</CLSN:ContractualObligationReductionNineteenMonthsFromInitialTerm>
    <CLSN:ContractualObligationRemaining contextRef="AsOf2012-04-30_us-gaap_StandbyLettersOfCreditMember" unitRef="USD" decimals="0">100000</CLSN:ContractualObligationRemaining>
    <CLSN:OperatingLeasesMonthlyRentPaymentInFirstYear contextRef="From2017-04-01to2017-04-30_custom_LawrencevilleNewJerseyMember" unitRef="USD" decimals="0">18900</CLSN:OperatingLeasesMonthlyRentPaymentInFirstYear>
    <CLSN:OperatingLeasesMonthlyRentPaymentInFinalYear contextRef="From2017-04-01to2017-04-30_custom_LawrencevilleNewJerseyMember" unitRef="USD" decimals="0">20500</CLSN:OperatingLeasesMonthlyRentPaymentInFinalYear>
    <CLSN:OperatingLeasesMonthlyRentPayment contextRef="From2018-01-01to2018-01-31_custom_EGENAssetPurchaseAgreementMember_custom_HuntsvilleAlabamaMember" unitRef="USD" decimals="0">18100</CLSN:OperatingLeasesMonthlyRentPayment>
    <us-gaap:ProceedsFromLicenseFeesReceived contextRef="From2013-01-17to2013-01-18_custom_HisunMember" unitRef="USD" decimals="0">5000000</us-gaap:ProceedsFromLicenseFeesReceived>
    <CLSN:DeferredRevenueAmortizationPeriod contextRef="From2013-01-01to2013-03-31">P10Y</CLSN:DeferredRevenueAmortizationPeriod>
    <CLSN:ShelfRegistrationStatementAmount contextRef="From2015-09-01to2015-09-30" unitRef="USD" decimals="0">75000000</CLSN:ShelfRegistrationStatementAmount>
    <CLSN:AggregateOfCommonAndPreferredStockSharesAuthorized contextRef="AsOf2016-09-30" unitRef="Shares" decimals="INF">112600000</CLSN:AggregateOfCommonAndPreferredStockSharesAuthorized>
    <us-gaap:StockholdersEquityReverseStockSplit contextRef="From2017-05-21to2017-05-26">14-for-1 reverse stock split </us-gaap:StockholdersEquityReverseStockSplit>
    <us-gaap:ClassOfWarrantOrRightOutstanding contextRef="AsOf2017-05-16" unitRef="Shares" decimals="INF">2400000</us-gaap:ClassOfWarrantOrRightOutstanding>
    <us-gaap:ClassOfWarrantOrRightOutstanding contextRef="AsOf2017-05-16_us-gaap_WarrantMember" unitRef="Shares" decimals="INF">33500000</us-gaap:ClassOfWarrantOrRightOutstanding>
    <us-gaap:ClassOfWarrantOrRightOutstanding contextRef="AsOf2018-09-30_custom_OctoberTwentynineTwoThousandEighteenMember100073798" unitRef="Shares" decimals="INF">1600000</us-gaap:ClassOfWarrantOrRightOutstanding>
    <us-gaap:StockIssuedDuringPeriodSharesNewIssues contextRef="From2017-10-25to2017-10-27_custom_UnderwritingAgreementMember_custom_OppenheimerAndCoIncMember" unitRef="Shares" decimals="INF">2640000</us-gaap:StockIssuedDuringPeriodSharesNewIssues>
    <us-gaap:StockIssuedDuringPeriodSharesNewIssues contextRef="From2017-07-05to2017-07-06_custom_July2017DirectOfferingMember" unitRef="Shares" decimals="INF">2050000</us-gaap:StockIssuedDuringPeriodSharesNewIssues>
    <us-gaap:StockIssuedDuringPeriodSharesNewIssues contextRef="From2017-02-13to2017-02-14_custom_February142017PublicOfferingMember" unitRef="Shares" decimals="INF">1384704</us-gaap:StockIssuedDuringPeriodSharesNewIssues>
    <us-gaap:StockIssuedDuringPeriodSharesNewIssues contextRef="From2013-05-02to2018-09-30_custom_ATMAgreementMember" unitRef="Shares" decimals="INF">1784396</us-gaap:StockIssuedDuringPeriodSharesNewIssues>
    <us-gaap:StockIssuedDuringPeriodSharesNewIssues contextRef="From2018-08-01to2018-08-31_custom_AspirePurchaseAgreementMember" unitRef="Shares" decimals="INF">164835</us-gaap:StockIssuedDuringPeriodSharesNewIssues>
    <us-gaap:StockIssuedDuringPeriodSharesNewIssues contextRef="From2018-01-01to2018-09-30_custom_OctoberTwentynineTwoThousandEighteenMember100122206" unitRef="Shares" decimals="INF">820714</us-gaap:StockIssuedDuringPeriodSharesNewIssues>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights contextRef="AsOf2017-06-26" unitRef="Shares" decimals="INF">506627</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights contextRef="AsOf2017-06-09_us-gaap_WarrantMember_srt_MaximumMember" unitRef="Shares" decimals="INF">790410</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights contextRef="AsOf2017-10-27_custom_UnderwritingAgreementMember_custom_OppenheimerAndCoIncMember" unitRef="Shares" decimals="INF">1320000</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights contextRef="AsOf2017-10-27_custom_October2017UnderwrittenOfferingMember_custom_InvestorWarrantMember" unitRef="Shares" decimals="INF">66000</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights contextRef="AsOf2017-07-06_custom_PreFundedSeriesCCCWarrantsMember_custom_July2017DirectOfferingMember" unitRef="Shares" decimals="INF">385000</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights contextRef="AsOf2017-07-06_custom_SeriesAAAWarrantsMember_custom_July2017DirectOfferingMember" unitRef="Shares" decimals="INF">2435000</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights contextRef="AsOf2017-07-06_custom_SeriesBBBWarrantsMember_custom_July2017DirectOfferingMember" unitRef="Shares" decimals="INF">2435000</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights contextRef="AsOf2017-10-04_custom_SeriesDDDWarrantsMember_custom_July2017DirectOfferingMember" unitRef="Shares" decimals="INF">1166250</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights contextRef="AsOf2017-02-14_custom_SeriesAAWarrantMember_custom_February142017PublicOfferingMember" unitRef="Shares" decimals="INF">1177790</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights contextRef="AsOf2017-02-14_custom_PreFundedSeriesBBWarrantMember_custom_February142017PublicOfferingMember" unitRef="Shares" decimals="INF">185713</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights contextRef="AsOf2013-02-22_srt_MaximumMember_us-gaap_WarrantMember" unitRef="Shares" decimals="INF">95811</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights contextRef="AsOf2014-01-15_us-gaap_WarrantMember_srt_MaximumMember" unitRef="Shares" decimals="INF">64348</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights contextRef="AsOf2015-05-27_custom_TwoThousandFifteenWarrantsMember_custom_May2015CommonStockOfferingMember" unitRef="Shares" decimals="INF">139284</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights>
    <us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights contextRef="AsOf2018-09-30_custom_OctoberTwentynineTwoThousandEighteenMember100073798" unitRef="Shares" decimals="INF">1600000</us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights>
    <us-gaap:ClassOfWarrantOrRightTitleOfSecurityWarrantsOrRightsOutstanding contextRef="From2017-10-25to2017-10-27_custom_UnderwritingAgreementMember_custom_OppenheimerAndCoIncMember">Each share of Common Stock is being sold together with 0.5 warrants (the &#8220;Investor Warrants&#8221;), each whole Investor Warrant being exercisable for one share of Common Stock, at an offering price of $2.50 per share and related Investor Warrants.</us-gaap:ClassOfWarrantOrRightTitleOfSecurityWarrantsOrRightsOutstanding>
    <CLSN:ClassOfWarrantOrRightOfferedPriceOfWarrantsOrRights contextRef="AsOf2017-10-27_us-gaap_WarrantMember" unitRef="USDPShares" decimals="INF">3.00</CLSN:ClassOfWarrantOrRightOfferedPriceOfWarrantsOrRights>
    <CLSN:ClassOfWarrantOrRightOfferedPriceOfWarrantsOrRights contextRef="AsOf2017-07-06_custom_PreFundedSeriesCCCWarrantsMember_custom_July2017DirectOfferingMember" unitRef="USDPShares" decimals="INF">2.06</CLSN:ClassOfWarrantOrRightOfferedPriceOfWarrantsOrRights>
    <CLSN:WarrantsIssuedExpirationPeriod contextRef="From2018-10-21to2018-10-27_us-gaap_WarrantMember">P5Y</CLSN:WarrantsIssuedExpirationPeriod>
    <CLSN:WarrantsIssuedExpirationPeriod contextRef="From2017-10-26to2017-10-27_custom_October2017UnderwrittenOfferingMember_custom_InvestorWarrantMember">P5Y</CLSN:WarrantsIssuedExpirationPeriod>
    <CLSN:ProceedsFromIssuanceOfCommonStockAndWarrants contextRef="From2017-10-26to2017-10-27_custom_October2017UnderwrittenOfferingMember_custom_InvestorWarrantMember" unitRef="USD" decimals="0">6600000</CLSN:ProceedsFromIssuanceOfCommonStockAndWarrants>
    <us-gaap:SharesIssuedPricePerShare contextRef="AsOf2017-02-14_custom_PreFundedSeriesBBWarrantMember_custom_February142017PublicOfferingMember" unitRef="USDPShares" decimals="INF">3.08</us-gaap:SharesIssuedPricePerShare>
    <us-gaap:SharesIssuedPricePerShare contextRef="AsOf2017-02-14_custom_February142017PublicOfferingMember" unitRef="USDPShares" decimals="INF">3.22</us-gaap:SharesIssuedPricePerShare>
    <us-gaap:SharePrice contextRef="AsOf2017-07-06_custom_July2017DirectOfferingMember" unitRef="USDPShares" decimals="INF">2.07</us-gaap:SharePrice>
    <CLSN:ProceedsFromIssuanceOfCommonStockGross contextRef="From2017-07-05to2017-07-06_custom_July2017DirectOfferingMember" unitRef="USD" decimals="0">4243500</CLSN:ProceedsFromIssuanceOfCommonStockGross>
    <CLSN:BeneficialOwnershipPercentageThreshold contextRef="AsOf2017-07-06_custom_PreFundedSeriesCCCWarrantsMember_custom_July2017DirectOfferingMember" unitRef="Percentage" decimals="INF">0.0999</CLSN:BeneficialOwnershipPercentageThreshold>
    <us-gaap:ProceedsFromIssuanceOfWarrants contextRef="From2017-07-05to2017-07-06_custom_PreFundedSeriesCCCWarrantsMember_custom_July2017DirectOfferingMember" unitRef="USD" decimals="0">793100</us-gaap:ProceedsFromIssuanceOfWarrants>
    <us-gaap:ProceedsFromIssuanceOfWarrants contextRef="From2017-10-03to2017-10-04_custom_July2017DirectOfferingMember" unitRef="USD" decimals="0">16600000</us-gaap:ProceedsFromIssuanceOfWarrants>
    <CLSN:ClassOfWarrantOrRightExercisedDuringPeriod contextRef="From2017-10-01to2017-12-31_custom_PreFundedSeriesCCCWarrantsMember_custom_July2017DirectOfferingMember" unitRef="Shares" decimals="INF">385000</CLSN:ClassOfWarrantOrRightExercisedDuringPeriod>
    <CLSN:ClassOfWarrantOrRightTerm contextRef="From2017-02-13to2017-02-14_custom_SeriesAAWarrantMember_custom_February142017PublicOfferingMember">P5Y</CLSN:ClassOfWarrantOrRightTerm>
    <CLSN:MaximumBeneficialOwnershipOfThePurchaser contextRef="From2017-02-13to2017-02-14_custom_February142017PublicOfferingMember" unitRef="Percentage" decimals="INF">0.0999</CLSN:MaximumBeneficialOwnershipOfThePurchaser>
    <us-gaap:ProceedsFromIssuanceOfCommonStock contextRef="From2017-02-13to2017-02-14_custom_February142017PublicOfferingMember" unitRef="USD" decimals="0">5000000</us-gaap:ProceedsFromIssuanceOfCommonStock>
    <us-gaap:ProceedsFromIssuanceOfCommonStock contextRef="From2013-05-02to2018-09-30_custom_ATMAgreementMember" unitRef="USD" decimals="0">12800000</us-gaap:ProceedsFromIssuanceOfCommonStock>
    <CLSN:StockIssuedDuringPeriodSharesExerciseOfWarrants contextRef="From2017-01-01to2017-12-31_custom_PreFundedSeriesBBWarrantMember_custom_February142017PublicOfferingMember" unitRef="Shares" decimals="INF">185713</CLSN:StockIssuedDuringPeriodSharesExerciseOfWarrants>
    <CLSN:StockIssuedDuringPeriodSharesExerciseOfWarrants contextRef="d_2017-01-01_2017-12-31_ClassOfWarrantOrRightAxis-SeriesAAWarrantMember_SubsidiarySaleOfStockAxis-February142017PublicOfferingMember" unitRef="Shares" decimals="INF">747254</CLSN:StockIssuedDuringPeriodSharesExerciseOfWarrants>
    <CLSN:IncreaseDecreaseInFairValueOfWarrants contextRef="From2017-06-08to2017-06-09_custom_TwoThousandThirteenWarrants2014WarrantsAndJune2016WarrantsMember" unitRef="USD" decimals="0">200000</CLSN:IncreaseDecreaseInFairValueOfWarrants>
    <CLSN:IncreaseDecreaseInFairValueOfWarrants contextRef="From2015-05-26to2015-05-27_custom_TwoThousandFifteenWarrantsMember" unitRef="USD" decimals="0">100000</CLSN:IncreaseDecreaseInFairValueOfWarrants>
    <us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment contextRef="AsOf2018-09-30_custom_EGENIncMember" unitRef="USD" decimals="0">35000</us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment>
    <us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets contextRef="AsOf2018-09-30_custom_EGENIncMember" unitRef="USD" decimals="0">24211000</us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets>
    <us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles contextRef="AsOf2018-09-30_custom_EGENIncMember" unitRef="USD" decimals="0">1591000</us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles>
    <us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets contextRef="AsOf2018-09-30_custom_EGENIncMember" unitRef="USD" decimals="0">27813000</us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets>
    <us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities contextRef="AsOf2018-09-30_custom_EGENIncMember" unitRef="USD" decimals="0">235000</us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities>
    <us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet contextRef="AsOf2018-09-30_custom_EGENIncMember" unitRef="USD" decimals="0">27578000</us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet>
    <us-gaap:LongTermNotesPayable contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">9319579</us-gaap:LongTermNotesPayable>
    <us-gaap:LongTermNotesPayable contextRef="AsOf2017-12-31" unitRef="USD" xsi:nil="true" />
    <us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">375000</us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax>
    <us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">375000</us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax>
    <us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">125000</us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax>
    <us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">125000</us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax>
    <CLSN:DeemedDividendRelatedToWarrantModification contextRef="From2018-01-01to2018-09-30" unitRef="USD" xsi:nil="true" />
    <CLSN:DeemedDividendRelatedToWarrantModification contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">-345685</CLSN:DeemedDividendRelatedToWarrantModification>
    <CLSN:DeemedDividendRelatedToWarrantModification contextRef="From2018-07-01to2018-09-30" unitRef="USD" xsi:nil="true" />
    <CLSN:DeemedDividendRelatedToWarrantModification contextRef="From2017-04-01to2017-06-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">-17363937</us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic>
    <us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">-16067019</us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic>
    <us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">-4656386</us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic>
    <us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">-5671329</us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic>
    <us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">31124</us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent>
    <us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent contextRef="From2017-01-01to2017-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">26877</us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent>
    <us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent contextRef="From2017-04-01to2017-06-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">11125</us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax>
    <us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax contextRef="From2017-01-01to2017-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">2788</us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax>
    <us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax contextRef="From2017-04-01to2017-06-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">42249</us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax>
    <us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax contextRef="From2017-01-01to2017-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">29665</us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax>
    <us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax contextRef="From2017-04-01to2017-06-30" unitRef="USD" xsi:nil="true" />
    <CLSN:RefundDepositOnCorporateOfficeLease contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">50000</CLSN:RefundDepositOnCorporateOfficeLease>
    <CLSN:RefundDepositOnCorporateOfficeLease contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">-100000</CLSN:RefundDepositOnCorporateOfficeLease>
    <us-gaap:ProceedsFromNotesPayable contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">9725000</us-gaap:ProceedsFromNotesPayable>
    <us-gaap:ProceedsFromNotesPayable contextRef="From2017-01-01to2017-09-30" unitRef="USD" xsi:nil="true" />
    <CLSN:WarrantsTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;Note 14.&amp;#9;Warrants &lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;&lt;i&gt;Common Stock Warrants&lt;/i&gt;&lt;/b&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Following is a summary of all warrant activity&#13;for the nine months ended September 30, 2018:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid"&gt;&lt;font style="font-size: 10pt"&gt;Warrants&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Number of&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Warrants&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Issued&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Weighted&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Average&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Exercise Price&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 64%"&gt;&lt;font style="font-size: 10pt"&gt;Warrants outstanding at December 31, 2017&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 15%; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;3,058,402&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&lt;font style="font-size: 10pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 15%; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;5.29&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&lt;font style="font-size: 10pt"&gt;Warrants issued during the nine months ended September 30, 2018 (see Note 10)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;190,114&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&lt;font style="font-size: 10pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;2.63&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="padding-bottom: 2.5pt"&gt;&lt;font style="font-size: 10pt"&gt;Warrants outstanding at September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 2.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;3,248,516&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 2.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 2.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 2.5pt"&gt;&lt;font style="font-size: 10pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 2.5pt; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;5.14&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 2.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&lt;font style="font-size: 10pt"&gt;Aggregate intrinsic value of outstanding warrants at September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid"&gt;&lt;font style="font-size: 10pt"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;69,229&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&lt;font style="font-size: 10pt"&gt;Weighted average remaining contractual terms at September 30, 2018 (in years)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;3.24&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt; text-align: right"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="padding-bottom: 1.5pt"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On October 29, 2018, the Company and certain&#13;investors holding warrants to collectively purchase 1.6 million shares of the Company&amp;#8217;s common stock, which were received&#13;in the February 2017 Public Offering and the October 2017 Underwritten Offering, entered into warrant exchange agreements whereby&#13;the Company issued 820,714 shares of its common stock in exchange for the warrants. After the warrant exchange, warrants outstanding&#13;totaled 1.6 million with a weighted average exercise price of $5.75 per share. Approximately 1.2 million of these outstanding&#13;warrants with a strike price of $6.20 per share will expire on April 4, 2019.&lt;/p&gt;</CLSN:WarrantsTextBlock>
    <us-gaap:ScheduleOfMaturitiesOfLongTermDebtTableTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Following is a schedule of future principle&#13;payments, net of unamortized debt discounts and amortized end of term charges, due on the Horizon Credit Agreement:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;For the year ending&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;September 30&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: center; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2019&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2020&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;-&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 79%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2021&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 18%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;4,583,333&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2022&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;5,000,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2023 and thereafter&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;416,667&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Subtotal of future principle payments&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;10,000,000&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Unamortized debt issuance costs, net&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;(680,421&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;)&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Total&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;9,319,579&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</us-gaap:ScheduleOfMaturitiesOfLongTermDebtTableTextBlock>
    <us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths contextRef="AsOf2018-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo contextRef="AsOf2018-09-30" unitRef="USD" xsi:nil="true" />
    <us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">4583333</us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree>
    <us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">5000000</us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour>
    <us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">416667</us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive>
    <us-gaap:DebtInstrumentCarryingAmount contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">10000000</us-gaap:DebtInstrumentCarryingAmount>
    <us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">680421</us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet>
    <us-gaap:LongTermDebt contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">9319579</us-gaap:LongTermDebt>
    <CLSN:PercentageOfOutstandingStockDeterminingFactorForIncentiveStockPrice contextRef="AsOf2018-09-30_custom_TwoThousandAndEighteenStockIncentivePlanMember" unitRef="Percentage" decimals="INF">0.10</CLSN:PercentageOfOutstandingStockDeterminingFactorForIncentiveStockPrice>
    <us-gaap:DeferredRevenue contextRef="AsOf2013-06-30" unitRef="USD" decimals="0">5000000</us-gaap:DeferredRevenue>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber contextRef="AsOf2018-09-30" unitRef="Shares" decimals="INF">3248516</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber contextRef="AsOf2017-12-31" unitRef="Shares" decimals="INF">3058402</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber>
    <CLSN:WeightedAverageExercisePriceVested contextRef="AsOf2018-09-30" unitRef="USDPShares" decimals="INF">5.14</CLSN:WeightedAverageExercisePriceVested>
    <CLSN:WeightedAverageExercisePriceVested contextRef="AsOf2017-12-31" unitRef="USDPShares" decimals="INF">5.29</CLSN:WeightedAverageExercisePriceVested>
    <CLSN:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisePrice contextRef="From2018-01-01to2018-09-30" unitRef="USDPShares" decimals="INF">2.63</CLSN:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisePrice>
    <CLSN:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsIntrinsicValueOutstanding contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">69229</CLSN:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsIntrinsicValueOutstanding>
    <CLSN:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsRemainingContractualTerm contextRef="From2018-01-01to2018-09-30">P3Y2M27D</CLSN:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsRemainingContractualTerm>
    <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted contextRef="From2018-01-01to2018-09-30" unitRef="Shares" decimals="INF">190114</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted>
    <us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">6392</us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss>
    <us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">10734</us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss>
    <CLSN:ScheduleOfWarrantActivityTableTextBlock contextRef="From2018-01-01to2018-09-30">&lt;p style="margin: 0pt"&gt;&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Following is a summary of all warrant&#13;activity for the nine months ended September 30, 2018:&lt;/p&gt;&#13;&#13;&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;&#13;&#13;&lt;table cellspacing="0" cellpadding="0" style="font: 11pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Warrants&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Number of&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Warrants&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Issued&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Weighted&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Average&lt;/b&gt;&lt;/p&gt;&#13;        &lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Exercise Price&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td colspan="2" style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="width: 64%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Warrants outstanding at December 31, 2017&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 15%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;3,058,402&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 15%; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;5.29&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="width: 1%; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Warrants issued during the nine months ended September 30, 2018 (see Note 10)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;190,114&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;2.63&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Warrants outstanding at September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 2.25pt double; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;3,248,516&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;5.14&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Aggregate intrinsic value of outstanding warrants at September 30, 2018&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;$&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;69,229&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;tr style="vertical-align: bottom; background-color: white"&gt;&#13;    &lt;td style="line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;Weighted average remaining contractual terms at September 30, 2018 (in years)&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="border-bottom: black 1.5pt solid; text-align: right; line-height: 107%"&gt;&lt;font style="font: 10pt Times New Roman, Times, Serif"&gt;3.24&lt;/font&gt;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="text-align: right; line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&#13;    &lt;td style="line-height: 107%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&#13;&lt;/table&gt;&#13;&#13;&#13;&lt;p style="margin: 0pt"&gt;&lt;/p&gt;</CLSN:ScheduleOfWarrantActivityTableTextBlock>
    <CLSN:PrecentageOfOutstandingPrincipleBalanceDescription contextRef="From2018-01-01to2018-09-30_custom_HorizonCreditAgreementMember">an amount equal to 1-3%</CLSN:PrecentageOfOutstandingPrincipleBalanceDescription>
    <us-gaap:RepaymentsOfLinesOfCredit contextRef="From2013-11-11to2013-11-30_custom_HerculesCreditAgreementMember_custom_FirstTrancheMember" unitRef="USD" decimals="0">4000000</us-gaap:RepaymentsOfLinesOfCredit>
    <us-gaap:StockIssuedDuringPeriodSharesStockSplits contextRef="From2017-05-21to2017-05-26" unitRef="Shares" decimals="INF">14</us-gaap:StockIssuedDuringPeriodSharesStockSplits>
    <us-gaap:StockIssuedDuringPeriodSharesStockSplits contextRef="From2017-05-15to2017-05-16" unitRef="Shares" decimals="INF">56982418</us-gaap:StockIssuedDuringPeriodSharesStockSplits>
    <us-gaap:StockIssuedDuringPeriodSharesReverseStockSplits contextRef="From2017-05-21to2017-05-26" unitRef="Shares" decimals="INF">14</us-gaap:StockIssuedDuringPeriodSharesReverseStockSplits>
    <us-gaap:StockIssuedDuringPeriodSharesReverseStockSplits contextRef="From2017-05-15to2017-05-16" unitRef="Shares" decimals="INF">4070172</us-gaap:StockIssuedDuringPeriodSharesReverseStockSplits>
    <us-gaap:ShortTermInvestments contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">18558771</us-gaap:ShortTermInvestments>
    <us-gaap:ShortTermInvestments contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">12734184</us-gaap:ShortTermInvestments>
    <us-gaap:ShortTermInvestments contextRef="AsOf2018-09-30_us-gaap_CertificatesOfDepositMember" unitRef="USD" decimals="0">3128390</us-gaap:ShortTermInvestments>
    <us-gaap:ShortTermInvestments contextRef="AsOf2017-12-31_us-gaap_CertificatesOfDepositMember" unitRef="USD" xsi:nil="true" />
    <us-gaap:ShortTermInvestments contextRef="AsOf2018-09-30_us-gaap_CorporateDebtSecuritiesMember" unitRef="USD" decimals="0">15430381</us-gaap:ShortTermInvestments>
    <us-gaap:ShortTermInvestments contextRef="AsOf2017-12-31_us-gaap_CorporateDebtSecuritiesMember" unitRef="USD" decimals="0">12734184</us-gaap:ShortTermInvestments>
    <CLSN:AvailableForSaleDebtSecuritiesAmortizedCostBasisCurrent contextRef="AsOf2018-09-30" unitRef="USD" decimals="0">18558771</CLSN:AvailableForSaleDebtSecuritiesAmortizedCostBasisCurrent>
    <CLSN:AvailableForSaleDebtSecuritiesAmortizedCostBasisCurrent contextRef="AsOf2017-12-31" unitRef="USD" decimals="0">12734184</CLSN:AvailableForSaleDebtSecuritiesAmortizedCostBasisCurrent>
    <dei:EntitySmallBusiness contextRef="From2018-01-01to2018-09-30">true</dei:EntitySmallBusiness>
    <dei:EntityEmergingGrowthCompany contextRef="From2018-01-01to2018-09-30">false</dei:EntityEmergingGrowthCompany>
    <dei:EntityExTransitionPeriod contextRef="From2018-01-01to2018-09-30">false</dei:EntityExTransitionPeriod>
    <us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">4510000</us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill>
    <us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">2520000</us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill>
    <us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill contextRef="From2018-07-01to2018-09-30" unitRef="USD" decimals="0">4510000</us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill>
    <us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill contextRef="From2017-04-01to2017-06-30" unitRef="USD" decimals="0">2520000</us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill>
    <CLSN:FairValueOfWarrantsIssuedInConnectionWithNotesPayable contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">507116</CLSN:FairValueOfWarrantsIssuedInConnectionWithNotesPayable>
    <CLSN:FairValueOfWarrantsIssuedInConnectionWithNotesPayable contextRef="From2017-01-01to2017-09-30" unitRef="USD" xsi:nil="true" />
    <CLSN:FairValueOfCommonStockIssuedAsEquityIssuanceCostsAndChargedAgainstPaidInCapital contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">450000</CLSN:FairValueOfCommonStockIssuedAsEquityIssuanceCostsAndChargedAgainstPaidInCapital>
    <CLSN:FairValueOfCommonStockIssuedAsEquityIssuanceCostsAndChargedAgainstPaidInCapital contextRef="From2017-01-01to2017-09-30" unitRef="USD" xsi:nil="true" />
    <CLSN:NoncashFinancingActivitesAndInvestingActivities contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">957116</CLSN:NoncashFinancingActivitesAndInvestingActivities>
    <CLSN:NoncashFinancingActivitesAndInvestingActivities contextRef="From2017-01-01to2017-09-30" unitRef="USD" xsi:nil="true" />
    <CLSN:InitialAssetsValue contextRef="AsOf2018-09-30_custom_EGENIncMember_custom_OvarianCancerMember" unitRef="USD" decimals="0">6900000</CLSN:InitialAssetsValue>
    <CLSN:AggregateOfferingPrices contextRef="From2018-08-01to2018-08-31_custom_AspirePurchaseAgreementMember" unitRef="USD" decimals="0">15000000</CLSN:AggregateOfferingPrices>
    <CLSN:MaximumNumberOfSharesPurchasedPerDay contextRef="From2018-08-01to2018-08-31_custom_AspirePurchaseAgreementMember" unitRef="Shares" decimals="INF">100000</CLSN:MaximumNumberOfSharesPurchasedPerDay>
    <CLSN:MaximumNumberOfSharesPurchasedPerDayAdditional contextRef="From2018-08-01to2018-08-31_custom_AspirePurchaseAgreementMember" unitRef="Shares" decimals="INF">2000000</CLSN:MaximumNumberOfSharesPurchasedPerDayAdditional>
    <CLSN:PurchaseAgreementTerms contextRef="From2018-08-01to2018-08-31_custom_AspirePurchaseAgreementMember">In addition, on any date on which the Company submits a Purchase Notice to Aspire Capital in an amount equal to at least 100,000 shares, the Company also has the right, in its sole discretion, to present Aspire Capital with a volume-weighted average price purchase notice (each, a &#8220;VWAP Purchase Notice&#8221;) directing Aspire Capital to purchase an amount of stock equal to up to 30% of the aggregate shares of the Company&#8217;s common stock traded on its principal market on the next trading day (the &#8220;VWAP Purchase Date&#8221;), subject to a maximum number of shares the Company may determine. The purchase price per share pursuant to such VWAP Purchase Notice is generally 97% of the volume-weighted average price for the Company&#8217;s common stock traded on its principal market on the VWAP Purchase Date</CLSN:PurchaseAgreementTerms>
    <us-gaap:SharesIssued contextRef="AsOf2018-09-28_custom_InducementOptionGrantsMember_custom_ThreeNewEmployeesMember_us-gaap_CommonStockMember" unitRef="Shares" decimals="INF">164004</us-gaap:SharesIssued>
    <us-gaap:SharesIssued contextRef="AsOf2018-09-28_custom_InducementOptionGrantsMember_custom_ThreeNewEmployeesMember_us-gaap_RestrictedStockMember98962541" unitRef="Shares" decimals="INF">19000</us-gaap:SharesIssued>
    <CLSN:NumberOfWarrantsExpiryInPeriod contextRef="From2018-01-01to2018-09-30_custom_OctoberTwentynineTwoThousandEighteenMember100122206" unitRef="Shares" decimals="INF">1200000</CLSN:NumberOfWarrantsExpiryInPeriod>
    <us-gaap:DerivativeVariableInterestRate contextRef="AsOf2018-09-30_custom_HorizonCreditAgreementMember_us-gaap_LondonInterbankOfferedRateLIBORMember" unitRef="Percentage" decimals="INF">0.07625</us-gaap:DerivativeVariableInterestRate>
    <us-gaap:DebtConversionOriginalDebtInterestRateOfDebt contextRef="From2014-06-09to2014-06-10_custom_HerculesCreditAgreementMember_custom_SecondTrancheMember" unitRef="Percentage" decimals="INF">0.035</us-gaap:DebtConversionOriginalDebtInterestRateOfDebt>
    <us-gaap:DebtConversionOriginalDebtInterestRateOfDebt contextRef="From2018-01-01to2018-09-30_custom_HorizonWarrantMember_custom_HorizonCreditAgreementMember" unitRef="Percentage" decimals="INF">0.040</us-gaap:DebtConversionOriginalDebtInterestRateOfDebt>
    <CLSN:ImpairmentOfInprocessResearchAndDevelopment contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">4510000</CLSN:ImpairmentOfInprocessResearchAndDevelopment>
    <CLSN:ImpairmentOfInprocessResearchAndDevelopment contextRef="From2017-01-01to2017-09-30" unitRef="USD" decimals="0">2520000</CLSN:ImpairmentOfInprocessResearchAndDevelopment>
    <dei:DocumentFiscalYearFocus contextRef="From2018-01-01to2018-09-30">2018</dei:DocumentFiscalYearFocus>
    <CLSN:NetCashProceedsForNol contextRef="From2018-01-01to2018-09-30" unitRef="USD" decimals="0">10000000</CLSN:NetCashProceedsForNol>
    <CLSN:WarrantExpirationDate contextRef="From2018-01-01to2018-09-30_custom_OctoberTwentynineTwoThousandEighteenMember100122206">2019-04-04</CLSN:WarrantExpirationDate>
    <us-gaap:SaleOfStockPricePerShare contextRef="AsOf2018-09-30_custom_OctoberTwentynineTwoThousandEighteenMember100073798" unitRef="USDPShares" decimals="INF">6.20</us-gaap:SaleOfStockPricePerShare>
</xbrli:xbrl>
