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Loans And Leases (Nonaccrual Loans As Troubled Debt Restructuring) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Total nonaccrual and nonperforming loans	$ 147	$ 190

X

- Definition

Financing Receivable Recorded Investment Nonaccrual Trouble Debt Restructured

+ References

No definition available.

+ Details

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Namespace Prefix:	cfbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: