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v2.4.1.9

Preferred Stock (Details) (USD $) | 1 Months Ended | 0 Months Ended | 2 Months Ended |  |
--- | --- | --- | --- | --- | ---
Apr. 30, 2015 | Jul. 15, 2015 | May 12, 2015 | Jul. 15, 2015 | Mar. 31, 2015 | Dec. 31, 2014
Schedule of Capitalization, Equity [Line Items] |  |  |  |  |  |
Preferred Stock Shares Issued |  |  |  |  | 480,000 us-gaap_PreferredStockSharesIssued |
Aggregate value |  |  |  |  | $ 5,000 us-gaap_PreferredStockValue | $ 5,000 us-gaap_PreferredStockValue
Series B Preferred Stock [Member] |  |  |  |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |  |  |  |
Preferred Stock Shares Issued |  |  |  |  | 480,000 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 480,000 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember
Warrant number of common stock shares purchased |  |  |  |  | 2.00 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |
Warrant, value |  |  |  |  | 700 us-gaap_WarrantsAndRightsOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |
Warrant, shares |  |  |  |  | (28,000)us-gaap_ClassOfWarrantOrRightOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |
Common Stock |  |  |  |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |  |  |  |
Warrant number of common stock shares purchased |  |  |  |  | 3.25 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |
Warrant, value |  |  |  |  | 700 us-gaap_WarrantsAndRightsOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |
Warrant, shares |  |  |  |  | (28,000)us-gaap_ClassOfWarrantOrRightOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |
Subsequent Event [Member] | Non-Cumulative Convertible Perpetual Preferred Stock Series B [Member] | Private Placement [Member] |  |  |  |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |  |  |  |
Preferred stock rate | 6.25%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = cfbk_NonCumulativeConvertiblePerpetualPreferredStockSeriesBMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |  |  |  |
Price per share | $ 25.00 us-gaap_SharesIssuedPricePerShare / us-gaap_StatementClassOfStockAxis = cfbk_NonCumulativeConvertiblePerpetualPreferredStockSeriesBMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |  |  |  |
Subsequent Event [Member] | Series B Preferred Stock [Member] | Private Placement [Member] |  |  |  |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |  |  |  |
Preferred Stock Shares Issued |  | 480,000 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember | 480,000 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember | 480,000 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |
Aggregate value |  | 12,000 us-gaap_PreferredStockValue / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember | 12,000 us-gaap_PreferredStockValue / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember | 12,000 us-gaap_PreferredStockValue / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |
Expenses for issuance of stock |  | 482 us-gaap_PaymentsOfStockIssuanceCosts / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember | 482 us-gaap_PaymentsOfStockIssuanceCosts / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |  |
Other offering expenses |  | 149 cfbk_OtherIssuanceExpenses / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember | 149 cfbk_OtherIssuanceExpenses / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |  |
Proceeds from Issuance of Private Placement |  |  |  | $ 11,369 us-gaap_ProceedsFromIssuanceOfPrivatePlacement / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |

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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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