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Significant Accounting Policies (Details) - Schedule of outstanding share options and warrants - shares | 12 Months Ended
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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

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- 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

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- 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