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Net Loss Per Common Share (Details Narative) - shares	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Restricted Stock [Member]
Antidilutive securities excluded from computation of earnings per share	2,964	15,686
Stock Option [Member]
Antidilutive securities excluded from computation of earnings per share	1,023,513	723,194
Warrant [Member]
Antidilutive securities excluded from computation of earnings per share	378,442	353,585

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=celc_StockOptionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=celc_WarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: