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Subsequent Event (Details)	May. 10, 2016
Subsequent Event [Member]
Common stock repurchase, percent	3.00%

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- Definition

Common stock repurchase, percent

+ References

No definition available.

+ Details

Name:	cfbk_CommonStockRepurchasePercent
Namespace Prefix:	cfbk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: