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Loans (Financing Receivables Credit Quality Indicators) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Financing Receivable, Recorded Investment [Line Items] |  |
Loans | $ 264,147 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome | $ 212,870 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Not Rated [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 82,164 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember | 52,258 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember
Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 166,685 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 142,787 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 2,353 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 2,936 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 12,945 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 14,889 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 46,656 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember | 37,526 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial Portfolio Segment [Member] | Not Rated [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 1,090 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember | 228 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember
Commercial Portfolio Segment [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 44,663 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 35,424 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Commercial Portfolio Segment [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 443 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 921 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Commercial Portfolio Segment [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 460 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 953 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Single-Family Residential[Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 51,542 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember | 32,219 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember
Single-Family Residential[Member] | Not Rated [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 50,961 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember | 31,685 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember
Single-Family Residential[Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 581 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 534 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Multi-Family Residential [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 28,863 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember | 32,197 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember
Multi-Family Residential [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 26,481 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 29,667 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Multi-Family Residential [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 2,382 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 2,530 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Real Estate, Commercial [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 91,404 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialMember | 83,752 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialMember
Real Estate, Commercial, Non-Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 49,142 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember | 43,121 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember
Real Estate, Commercial, Non-Owner Occupied [Member] | Not Rated [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 139 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember | 3,170 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember
Real Estate, Commercial, Non-Owner Occupied [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 43,665 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 34,834 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Real Estate, Commercial, Non-Owner Occupied [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 89 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 556 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Real Estate, Commercial, Non-Owner Occupied [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 5,249 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 4,561 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Real Estate, Commercial, Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 35,991 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember | 35,203 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember
Real Estate, Commercial, Owner Occupied [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 33,389 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 31,489 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Real Estate, Commercial, Owner Occupied [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 1,508 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 1,045 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Real Estate, Commercial, Owner Occupied [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 1,094 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 2,669 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Real Estate, Commercial, Land Acquisition [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 6,271 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember | 5,428 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember
Real Estate, Commercial, Land Acquisition [Member] | Not Rated [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 78 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember | 87 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember
Real Estate, Commercial, Land Acquisition [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 3,428 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 2,023 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Real Estate, Commercial, Land Acquisition [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 2,765 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 3,318 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Construction [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 23,732 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember | 11,465 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember
Construction [Member] | Not Rated [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 8,673 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember | 2,115 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember
Construction [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 15,059 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 9,350 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Home Equity Line of Credit [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 16,955 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_HomeEquityMember | 14,851 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_HomeEquityMember
Home Equity Line of Credit, Originated Portfolio [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 15,520 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditOriginatedPortfolioMember | 12,982 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditOriginatedPortfolioMember
Home Equity Line of Credit, Originated Portfolio [Member] | Not Rated [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 15,370 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditOriginatedPortfolioMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember | 12,828 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditOriginatedPortfolioMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember
Home Equity Line of Credit, Originated Portfolio [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 150 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditOriginatedPortfolioMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 154 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditOriginatedPortfolioMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Home Equity Line of Credit, Purchased Portfolio [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 1,435 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditPurchasedPortfolioMember | 1,869 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditPurchasedPortfolioMember
Home Equity Line of Credit, Purchased Portfolio [Member] | Not Rated [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 858 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditPurchasedPortfolioMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember | 1,285 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditPurchasedPortfolioMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember
Home Equity Line of Credit, Purchased Portfolio [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 313 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditPurchasedPortfolioMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 414 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditPurchasedPortfolioMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Home Equity Line of Credit, Purchased Portfolio [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 264 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditPurchasedPortfolioMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 170 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditPurchasedPortfolioMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Other consumer [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 4,995 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerOtherFinancingReceivableMember | 860 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerOtherFinancingReceivableMember
Other consumer [Member] | Not Rated [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | $ 4,995 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerOtherFinancingReceivableMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember | $ 860 us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerOtherFinancingReceivableMember / us-gaap_InternalCreditAssessmentAxis = cfbk_NotRatedMember

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