v3.25.4

Fair Value (as Restated), Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | $ 185,938 | $ 203,862
Federal Agency Mortgage-backed Securities [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 52,331 | 53,029
Federal Agency CMOs [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 19,255 | 20,058
Federal Agency Debt [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 40,527 | 40,034
Municipal Bonds [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 4,418 | 4,388
U.S. Treasuries [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 60,552 | 77,190
SBA Pools [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 8,855 | 9,163
Recurring Basis [Member] | Federal Agency Mortgage-backed Securities [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 52,331 | 53,029
Recurring Basis [Member] | Federal Agency CMOs [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 19,255 | 20,058
Recurring Basis [Member] | Federal Agency Debt [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 40,527 | 40,034
Recurring Basis [Member] | Municipal Bonds [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 4,418 | 4,388
Recurring Basis [Member] | U.S. Treasuries [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 60,552 | 77,190
Recurring Basis [Member] | SBA Pools [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 8,855 | 9,163
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Federal Agency Mortgage-backed Securities [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 0 | 0
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Federal Agency CMOs [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 0 | 0
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Federal Agency Debt [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 0 | 0
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Municipal Bonds [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 0 | 0
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Treasuries [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 60,552 | 77,190
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | SBA Pools [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 0 | 0
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Federal Agency Mortgage-backed Securities [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 52,331 | 53,029
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Federal Agency CMOs [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 19,255 | 20,058
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Federal Agency Debt [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 40,527 | 40,034
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Municipal Bonds [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 4,418 | 4,388
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Treasuries [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 0 | 0
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | SBA Pools [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 8,855 | 9,163
Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Federal Agency Mortgage-backed Securities [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 0 | 0
Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Federal Agency CMOs [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 0 | 0
Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Federal Agency Debt [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 0 | 0
Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Municipal Bonds [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 0 | 0
Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Treasuries [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | 0 | 0
Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | SBA Pools [Member] |  |
Assets Measured on Recurring Basis [Abstract] |  |
Securities available-for-sale | $ 0 | $ 0

X
- References No definition available. + Details
Name: | byfc_AssetsMeasuredOnRecurringBasisAbstract
Namespace Prefix: | byfc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 103 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-103 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481830/320-10-45-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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

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

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

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

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |