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Foreclosed Assets (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Foreclosed Assets [Abstract]
Expenses related to foreclosed assets	$ 0	$ 0	$ 0

X

- Definition

Foreclosed Assets, Net

+ References

No definition available.

+ Details

Name:	cfbk_ForeclosedAssetsNet
Namespace Prefix:	cfbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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