Financing Receivable, Modified in Period, Number of Loans.

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

Percentage of increase in percentage points added to the reference rate to compute the variable rate on contractual interest rate of financing receivable modified for debtor experiencing financial difficulty.

+ References

No definition available.

+ Details

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Namespace Prefix:	cfbk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of increase in maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Balance Type:	na
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- 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

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+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Percentage of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesPercent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amortized cost of financing receivable modified during period for debtor experiencing financial difficulty.

+ References

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease.

+ References

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease.

+ References

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+ Details

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Period Type:	instant

- Details

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Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Loans And Leases (Narrative) (Details)	3 Months Ended		6 Months Ended		12 Months Ended
Loans And Leases (Narrative) (Details)	Jun. 30, 2025 USD ($) Loan	Jun. 30, 2024 USD ($) Loan	Jun. 30, 2025 USD ($) Loan	Jun. 30, 2024 USD ($) Loan	Dec. 31, 2024 USD ($) Loan
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans	$ 16,632,000		$ 16,632,000		$ 14,538,000
Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans 90 days or more past due and still accruing interest					$ 509,000
Number of loans modified to borrowers experiencing financial difficulty \| Loan			0		2
Small Business Administration (SBA) [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans					$ 1,500,000
Commercial Portfolio Segment [Member]
Accounts Notes And Loans Receivable [Line Items]
Number of loans modified to borrowers experiencing financial difficulty \| Loan	0		0
Nonaccrual Loans	$ 14,577,000		$ 14,577,000		$ 12,876,000
Commercial Portfolio Segment [Member] \| Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Loans	$ 694		$ 694
Commercial Portfolio Segment [Member] \| Extended Maturity and Interest Rate Increase [Member]
Accounts Notes And Loans Receivable [Line Items]
Number of loans modified to borrowers experiencing financial difficulty \| Loan		1		1
Loan modifications to borrowers experiencing financial difficulty, amount		$ 4,400,000		$ 4,400,000
Percentage of financing receivable modified during period			1.00%
Increase in interest rate for loan modification			75.00%
Modification maturity date extension			6 months