No definition available.

Name:	byfc_CollateralDependentLoansByCollateralTypeAbstract
Namespace Prefix:	byfc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of allowance for credit loss on collateral dependent loan. Excludes allowance for financing receivable covered under loss sharing agreement.

+ References

No definition available.

+ Details

Name:	byfc_FinancingReceivableAllowanceForCreditLossCollateralDependentLoan
Namespace Prefix:	byfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after the effects of master netting arrangements, of securities loaned to entities in exchange for collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

No definition available.

+ Details

Name:	byfc_FinancingReceivableIndividuallyEvaluatedBasedOnUnderlyingValueOfCollateral
Namespace Prefix:	byfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of loans whose payments were being supported by a guarantor. Excludes allowance for financing receivable covered under loss sharing agreement.

+ References

No definition available.

+ Details

Name:	byfc_FinancingReceivableNumberOfLoansWhosePaymentsWereBeingSupportedByGuarantor
Namespace Prefix:	byfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of loans individually evaluated using discounted cash flow approach.

+ References

No definition available.

+ Details

Name:	byfc_NumberOfLoansIndividuallyEvaluatedUsingDiscountedCashFlowApproach
Namespace Prefix:	byfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 80
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479294/326-20-55-80

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479294/326-20-55-79

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3)(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (1)
-Publisher SEC

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (2)
-Publisher SEC

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Regulation S-K (SK)
-Number 229
-Section 1404
-Paragraph (a)
-Publisher SEC

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-14

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-SubTopic 10
-Topic 310
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-7A

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

+ Details

Name:	us-gaap_NotesReceivableGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_CollateralAxis=us-gaap_CollateralPledgedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=byfc_CollateralPledgedSingleFamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=byfc_CollateralPledgedMultiUseResidentialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=byfc_CollateralPledgedChurchMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=byfc_CollateralPledgedBusinessAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=byfc_SingleFamilyLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=byfc_MultifamilyLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=byfc_ChurchLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Loans Receivable Held for Investment, Collateral Dependent Loans by Collateral Type (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) Loan	Dec. 31, 2022 USD ($)
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	$ 832,536	$ 773,444
Individually evaluated loans based on the underlying value of collateral	$ 6,800
Number of loans individually evaluated using discounted cash flow approach \| Loan	0
Reserve for collateral dependent loans	$ 119
Collateral Pledged [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	6,831
Collateral Pledged - Single Family [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	50
Collateral Pledged - Multi-Use Residential [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	$ 5,741
Number of loans whose payments were being supported by guarantor \| Loan	1
Collateral Pledged - Church [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	$ 765
Collateral Pledged - Business Assets [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	275
Real Estate [Member] \| Single Family [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	25,952	30,038
Real Estate [Member] \| Single Family [Member] \| Collateral Pledged [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	50
Real Estate [Member] \| Single Family [Member] \| Collateral Pledged - Single Family [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	50
Real Estate [Member] \| Single Family [Member] \| Collateral Pledged - Multi-Use Residential [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Real Estate [Member] \| Single Family [Member] \| Collateral Pledged - Church [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Real Estate [Member] \| Single Family [Member] \| Collateral Pledged - Business Assets [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Real Estate [Member] \| Multi-Family [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	530,464	503,896
Real Estate [Member] \| Multi-Family [Member] \| Collateral Pledged [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	5,741
Real Estate [Member] \| Multi-Family [Member] \| Collateral Pledged - Single Family [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Real Estate [Member] \| Multi-Family [Member] \| Collateral Pledged - Multi-Use Residential [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	5,741
Real Estate [Member] \| Multi-Family [Member] \| Collateral Pledged - Church [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Real Estate [Member] \| Multi-Family [Member] \| Collateral Pledged - Business Assets [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Real Estate [Member] \| Commercial Real Estate [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	128,029	114,574
Real Estate [Member] \| Commercial Real Estate [Member] \| Collateral Pledged [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	74
Real Estate [Member] \| Commercial Real Estate [Member] \| Collateral Pledged - Single Family [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Real Estate [Member] \| Commercial Real Estate [Member] \| Collateral Pledged - Multi-Use Residential [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Real Estate [Member] \| Commercial Real Estate [Member] \| Collateral Pledged - Church [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	74
Real Estate [Member] \| Commercial Real Estate [Member] \| Collateral Pledged - Business Assets [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Real Estate [Member] \| Church [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	11,946	15,780
Real Estate [Member] \| Church [Member] \| Collateral Pledged [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	691
Real Estate [Member] \| Church [Member] \| Collateral Pledged - Single Family [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Real Estate [Member] \| Church [Member] \| Collateral Pledged - Multi-Use Residential [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Real Estate [Member] \| Church [Member] \| Collateral Pledged - Church [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	691
Real Estate [Member] \| Church [Member] \| Collateral Pledged - Business Assets [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Commercial - Other [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans		$ 68,442
Commercial - Other [Member] \| Collateral Pledged [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	275
Commercial - Other [Member] \| Collateral Pledged - Single Family [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Commercial - Other [Member] \| Collateral Pledged - Multi-Use Residential [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Commercial - Other [Member] \| Collateral Pledged - Church [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	0
Commercial - Other [Member] \| Collateral Pledged - Business Assets [Member]
Collateral Dependent Loans By Collateral Type [Abstract]
Total Loans	$ 275