XML 46 R36.htm IDEA: XBRL DOCUMENT v3.21.1

Net Loss Per Common Share (Details Narrative) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Number of shares of common stock issuable upon exercise of warrants and equity awards	9,197,728	7,982,990
Warrants exercise price	$ 0.01
Number of shares of common stock issued in calculation basic loss per share		200,000

X

- Definition

Represents the total number of Shares of common stock issuable upon exercise of warrants and equity awards.

+ References

No definition available.

+ Details

Name:	CLSN_NumberOfSharesOfCommonStockIssuableUponExerciseOfWarrantsAndEquityAwards
Namespace Prefix:	CLSN_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of shares of common stock issued in calculation basic loss per share.

+ References

No definition available.

+ Details

Name:	CLSN_NumberOfSharesOfCommonStockIssuedInCalculationBasicLossPerShare
Namespace Prefix:	CLSN_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_EarningsPerShareAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration