Debt instrument maximum borrowing capacity amount.

No definition available.

Name:	cfbk_DebtInstrumentMaximumBorrowingCapacityAmount
Namespace Prefix:	cfbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Period between issuance and maturity of debt instrument, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Indicates type of variable interest rate on debt instrument.

+ References

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Namespace Prefix:	us-gaap_
Data Type:	enum2:enumerationSetItemType
Balance Type:	na
Period Type:	duration

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

- Definition

Amount of maximum advances or credit lines available from the Federal Home Loan Bank (FHLB).

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date the credit facility terminates, in YYYY-MM-DD format.

+ References

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

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Period Type:	instant

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- 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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Balance Type:
Period Type:

- Details

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Balance Type:
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Balance Type:
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- Details

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- Details

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FHLB Advances And Other Debt (Narrative) (Details) - USD ($)			1 Months Ended	6 Months Ended
	Apr. 30, 2025	May 21, 2021	Dec. 31, 2018	Jun. 30, 2026	Dec. 31, 2025
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
Amount available of FHLB				$ 236,053,000
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]		us-gaap:PrimeRateMember	us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember	us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Federal Reserve Bank Advances [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
Outstanding borrowings				$ 0	$ 0
Debt instrument maximum borrowing capacity amount				143,872,000
Line Of Credit [Member] \| Commercial Bank One [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
Unused line of credit				50,000,000
Line Of Credit [Member] \| Commercial Bank Two [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
Unused line of credit				15,000,000
Line Of Credit [Member] \| Commercial Bank One And Two [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
Line of credit, outstanding balance				0	$ 0
Revolving Credit Facility [Member] \| Third-Party Bank [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
Line of credit, borrowing capacity		$ 35,000,000
Interest rate		3.85%
Line of credit, expiration date		May 21, 2024
Line of credit, outstanding balance				$ 41,231,000
Debt Instrument, Term				10 years
Revolving Credit Facility [Member] \| Third-Party Bank [Member] \| Interest Rate Floor [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
Variable rate spread		3.25%
New Revolving Line of Credit [Member] \| Third-Party Bank [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
Line of credit, borrowing capacity	$ 10,000,000
Interest rate	6.00%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:PrimeRateMember
Line of credit, expiration date	Apr. 30, 2027