Debt instrument maximum borrowing capacity amount.

No definition available.

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

- Definition

PPPLF Fixed Rate

+ References

No definition available.

+ Details

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

- Definition

Weighted Average Life Of PPP Loans and PPPLF Funding

+ References

No definition available.

+ Details

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Namespace Prefix:	cfbk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13(3)(a))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22 (b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ 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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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-Name Accounting Standards Codification
-Topic 944
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-Section S99
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-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

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

- Definition

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

+ References

+ Details

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Namespace Prefix:	us-gaap_
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

+ 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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(a))
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-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

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Balance Type:	credit
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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- Details

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FHLB Advances And Other Debt (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2018
Amount available of FHLB			$ 81,409,000
Federal Reserve Bank Advances [Member]
Outstanding borrowings		$ 0	0
Debt instrument maximum borrowing capacity amount			81,508,000
Line Of Credit [Member] \| Third-Party Bank [Member]
Line of credit, borrowing capacity				$ 10,000,000
Line of credit outstanding		0	5,000,000
Line Of Credit [Member] \| Third-Party Bank [Member] \| Term Loan [Member]
Principal payments			$ 125,000
Variable rate spread			0.75%
Line of credit, expiration date			Dec. 23, 2022
Line of credit outstanding		5,000,000	$ 4,500,000
Line Of Credit [Member] \| Commercial Bank One [Member]
Unused line of credit			50,000,000
Line Of Credit [Member] \| Commercial Bank Two [Member]
Unused line of credit			15,000,000
Line Of Credit [Member] \| Commercial Bank One And Two [Member]
Line of credit outstanding		0	$ 0
FRB PPPLF Advances [Member]
PPPLF fixed rate			0.35%
Weighted average life			1 year 2 months 12 days
Outstanding borrowings			$ 107,413,000
Warehouse Facility One [Member] \| Commercial Bank [Member]
Line of credit, borrowing capacity		25,000,000
Line of credit outstanding		7,517,000	0
Warehouse Facility Two [Member] \| Commercial Bank [Member]
Line of credit, borrowing capacity	$ 75,000,000
Line of credit outstanding		$ 0	$ 70,013,000
Minimum [Member] \| Warehouse Facility One [Member] \| Commercial Bank [Member] \| London Interbank Offered Rate [Member]
Variable rate spread		2.00%
Minimum [Member] \| Warehouse Facility Two [Member] \| Commercial Bank [Member] \| London Interbank Offered Rate [Member]
Variable rate spread	1.75%
Maximum [Member] \| Warehouse Facility One [Member] \| Commercial Bank [Member] \| London Interbank Offered Rate [Member]
Variable rate spread		4.00%
Maximum [Member] \| Warehouse Facility Two [Member] \| Commercial Bank [Member] \| London Interbank Offered Rate [Member]
Variable rate spread	3.50%