XML 72 R55.htm IDEA: XBRL DOCUMENT
v3.20.2

Warrants - Summary of Warrant Activity (Details) | 6 Months Ended
--- | ---
Jun. 30, 2020 USD ($) $ / shares shares
Warrants and Rights Note Disclosure [Abstract] |
Number of Warrants Issued, Warrants Outstanding, Beginning Balance | shares | 626,098
Number of Warrants Issued, Warrants Issued | shares | 3,200,000
Number of Warrants Issued, Warrants Outstanding, Ending Balance | shares | 3,826,098
Weighted Average Exercise Price, Warrants Outstanding, Beginning Balance | $ / shares | $ 1.87
Weighted Average Exercise Price, Warrants Issued | $ / shares | 1.24
Weighted Average Exercise Price, Warrants Outstanding, Ending Balance | $ / shares | $ 1.34
Aggregate Intrinsic Value of Outstanding Warrants | $ | $ 9,096,322

X
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of non-option equity. + References No definition available. + Details
Name: | CLSN_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix: | CLSN_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock non-option equity plan. + References No definition available. + Details
Name: | CLSN_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice
Namespace Prefix: | CLSN_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Sharebased compensation arrangement by sharebased payment award non options outstanding intrinsic value. + References No definition available. + Details
Name: | CLSN_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingIntrinsicValue
Namespace Prefix: | CLSN_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Net number of non-option equity instruments granted to participants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of equity instruments other than options outstanding, including both vested and non-vested instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_WarrantsAndRightsNoteDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration