XML 133 R117.htm IDEA: XBRL DOCUMENT
v3.24.1

Branch Sale (Narrative) (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 16, 2021 item | Sep. 30, 2021 USD ($) | Dec. 31, 2021 USD ($)
Pending Branch Sale [Line Items] |  |  |
Gain on sale of deposits |  |  | $ 1,893
Branch Purchase And Assumption Agreement [Member] |  |  |
Pending Branch Sale [Line Items] |  |  |
Number of branches sold | item | 2 |  |
Gain on sale of deposits |  | $ 1,900 |

X
- Definition Gain On Sale Of Deposits + References No definition available. + Details
Name: | cfbk_GainOnSaleOfDeposits
Namespace Prefix: | cfbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number Of Branches Sold + References No definition available. + Details
Name: | cfbk_NumberOfBranchesSold
Namespace Prefix: | cfbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=cfbk_BranchPurchaseAndAssumptionAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |