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Significant Accounting Policies (Details) - Schedule of outstanding share options and warrants - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Outstanding Share Options And Warrants Abstract
Options	27,002,200	18,422,700	11,923,400
Warrants	375,197,640	377,947,640	228,192,286
Total	402,199,840	396,370,340	240,115,686

X

- Definition

The number of options shares.

+ References

No definition available.

+ Details

Name:	canf_Options
Namespace Prefix:	canf_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	canf_ScheduleOfOutstandingShareOptionsAndWarrantsAbstract
Namespace Prefix:	canf_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of total shares.

+ References

No definition available.

+ Details

Name:	canf_TotalinDollars
Namespace Prefix:	canf_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ 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 https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant