Name:	mfbp_ExtendedPaymentTermsAbstract
Namespace Prefix:	mfbp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Number of financing receivables that have been modified by troubled debt restructurings, classified as restructurings for below market interest rate.

No definition available.

Name:	mfbp_FinancingReceivableModificationsNumberOfContracts1BelowMarket
Namespace Prefix:	mfbp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Number of financing receivables that have been modified by troubled debt restructurings, classified as restructurings for extended payment terms.

No definition available.

Name:	mfbp_FinancingReceivableModificationsNumberOfContracts1ExtendedPaymentTerms
Namespace Prefix:	mfbp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Amount of investment in financing receivables (after modification) modified by troubled debt restructurings, classified as restructurings for below market interest rate.

No definition available.

Name:	mfbp_FinancingReceivableModificationsPostModificationRecordedInvestment1BelowMarketInterestRate
Namespace Prefix:	mfbp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of investment in financing receivables (after modification) modified by troubled debt restructurings, classified as restructurings for extended payment terms.

No definition available.

Name:	mfbp_FinancingReceivableModificationsPostModificationRecordedInvestment1ExtendedPaymentTerms
Namespace Prefix:	mfbp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of investment in financing receivables (before modification) modified by troubled debt restructurings, classified as restructurings for below market interest rate.

No definition available.

Name:	mfbp_FinancingReceivableModificationsPreModificationRecordedInvestment1BelowMarketInterestRate
Namespace Prefix:	mfbp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of investment in financing receivables (before modification) modified by troubled debt restructurings, classified as restructurings for extended payment terms.

No definition available.

Name:	mfbp_FinancingReceivableModificationsPreModificationRecordedInvestment1ExtendedPaymentTerms
Namespace Prefix:	mfbp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

Name:	mfbp_SubsequentlyDefaultedAbstract
Namespace Prefix:	mfbp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

Name:	mfbp_TotalAbstract
Namespace Prefix:	mfbp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Number of financing receivables that have been modified by troubled debt restructurings.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524

Name:	us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

Name:	us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

Name:	us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953682-111524

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.