XML 76 R55.htm IDEA: XBRL DOCUMENT v3.20.1

Warrants - Summary of Warrant Activity (Details)	3 Months Ended
	Mar. 31, 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 | $	$ 178,000

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