XML 46 R36.htm IDEA: XBRL DOCUMENT v3.25.1

Note 3 - Loans - Loans by Credit Quality Indicators (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Originated current year	$ 7,271,103		$ 44,058,521
Originated prior year	46,104,357		32,442,459
Originated two years prior	36,446,315		109,789,683
Originated three years prior	115,060,876		33,689,261
Originated four years prior	33,099,607		68,992,186
Originated years prior	225,763,475		160,902,523
Revolving	240,329,642		264,462,552
Total loans	704,075,375		714,337,185
Gross charge-offs by vintage	(0)	$ (0)
Gross charge-offs by vintage	(0)	(0)
Commercial and Industrial [Member]
Originated current year	26,365		2,380,140
Originated prior year	2,244,848		196,286
Originated two years prior	184,723		0
Originated three years prior	0		0
Originated four years prior	0		311,422
Originated years prior	253,950		0
Revolving	2,360,961		3,275,899
Total loans	5,070,847		6,163,747
Originated current year, writeoffs	0		0
Originated prior year, writeoffs	0		0
Originated two years prior, writeoffs	0		0
Originated three years prior, writeoffs	0		0
Originated four years prior, writeoffs	0		0
Originated years prior, writeoffs	0		0
Revolving, writeoffs	0		0
Gross charge-offs by vintage	(0)	(0)	0
Gross charge-offs by vintage	(0)	(0)	0
Commercial and Industrial [Member] | Pass [Member]
Originated current year	26,365		2,380,140
Originated prior year	2,244,848		196,286
Originated two years prior	184,723		0
Originated three years prior	0		0
Originated four years prior	0		311,422
Originated years prior	253,950		0
Revolving	2,360,961		3,275,899
Total loans	5,070,847		6,163,747
Commercial and Industrial [Member] | Special Mention [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	0		0
Total loans	0		0
Commercial and Industrial [Member] | Substandard [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	0		0
Total loans	0		0
Commercial and Industrial [Member] | Doubtful [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	0		0
Total loans	0		0
Consumer Portfolio Segment [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	76,998		80,955
Total loans	76,998		80,955
Originated current year, writeoffs	0		0
Originated prior year, writeoffs	0		0
Originated two years prior, writeoffs	0		0
Originated three years prior, writeoffs	0		0
Originated four years prior, writeoffs	0		0
Originated years prior, writeoffs	0		0
Revolving, writeoffs	0		0
Gross charge-offs by vintage	(0)	(0)	0
Gross charge-offs by vintage	(0)	(0)	0
Consumer Portfolio Segment [Member] | Pass [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	76,998		80,955
Total loans	76,998		80,955
Consumer Portfolio Segment [Member] | Special Mention [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	0		0
Total loans	0		0
Consumer Portfolio Segment [Member] | Substandard [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	0		0
Total loans	0		0
Consumer Portfolio Segment [Member] | Doubtful [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	0		0
Total loans	0		0
Real Estate Loan [Member] | Residential Portfolio Segment [Member]
Originated current year	1,069,334		26,742,846
Originated prior year	27,818,216		20,620,971
Originated two years prior	20,731,206		102,163,479
Originated three years prior	104,554,548		31,658,834
Originated four years prior	31,351,533		26,147,651
Originated years prior	138,908,165		119,091,517
Revolving	141,744,173		146,322,244
Total loans	466,177,175		472,747,542
Originated current year, writeoffs	0		0
Originated prior year, writeoffs	0		0
Originated two years prior, writeoffs	0		0
Originated three years prior, writeoffs	0		0
Originated four years prior, writeoffs	0		0
Originated years prior, writeoffs	0		0
Revolving, writeoffs	0		0
Gross charge-offs by vintage	(0)	(0)	0
Gross charge-offs by vintage	(0)	(0)	0
Real Estate Loan [Member] | Residential Portfolio Segment [Member] | Pass [Member]
Originated current year	1,069,334		26,742,846
Originated prior year	27,818,216		20,620,971
Originated two years prior	20,731,206		102,163,479
Originated three years prior	104,554,548		31,658,834
Originated four years prior	31,351,533		25,961,474
Originated years prior	138,003,876		118,351,367
Revolving	140,804,020		145,384,614
Total loans	464,332,733		470,883,585
Real Estate Loan [Member] | Residential Portfolio Segment [Member] | Special Mention [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		186,177
Originated years prior	759,170		593,420
Revolving	601,737		598,461
Total loans	1,360,907		1,378,058
Real Estate Loan [Member] | Residential Portfolio Segment [Member] | Substandard [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	145,119		146,730
Revolving	338,416		339,169
Total loans	483,535		485,899
Real Estate Loan [Member] | Residential Portfolio Segment [Member] | Doubtful [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	0		0
Total loans	0		0
Real Estate Loan [Member] | Commercial Real Estate Portfolio Segment [Member]
Originated current year	6,175,404		14,935,535
Originated prior year	16,041,293		11,625,202
Originated two years prior	15,530,386		5,363,747
Originated three years prior	5,328,601		2,030,427
Originated four years prior	1,748,074		42,533,113
Originated years prior	80,526,688		39,901,866
Revolving	433,304		1,618,976
Total loans	125,783,750		118,008,866
Originated current year, writeoffs	0		0
Originated prior year, writeoffs	0		0
Originated two years prior, writeoffs	0		0
Originated three years prior, writeoffs	0		0
Originated four years prior, writeoffs	0		0
Originated years prior, writeoffs	0		0
Revolving, writeoffs	0		0
Gross charge-offs by vintage	(0)	(0)	0
Gross charge-offs by vintage	(0)	(0)	0
Real Estate Loan [Member] | Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Originated current year	6,175,404		14,935,535
Originated prior year	16,041,293		11,625,202
Originated two years prior	15,530,386		5,363,747
Originated three years prior	5,328,601		2,030,427
Originated four years prior	1,748,074		42,533,113
Originated years prior	79,777,004		38,696,841
Revolving	433,304		1,618,976
Total loans	125,034,066		116,803,841
Real Estate Loan [Member] | Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	749,684		754,633
Revolving	0		0
Total loans	749,684		754,633
Real Estate Loan [Member] | Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		450,392
Revolving	0		0
Total loans	0		450,392
Real Estate Loan [Member] | Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	0		0
Total loans	0		0
Real Estate Loan [Member] | Multi-Family Real Estate [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		2,262,457
Originated three years prior	5,177,727		0
Originated four years prior	0		0
Originated years prior	6,074,672		1,909,140
Revolving	62,212,743		69,980,821
Total loans	73,465,142		74,152,418
Originated current year, writeoffs	0		0
Originated prior year, writeoffs	0		0
Originated two years prior, writeoffs	0		0
Originated three years prior, writeoffs	0		0
Originated four years prior, writeoffs	0		0
Originated years prior, writeoffs	0		0
Revolving, writeoffs	0		0
Gross charge-offs by vintage	(0)	(0)	0
Gross charge-offs by vintage	(0)	(0)	0
Real Estate Loan [Member] | Multi-Family Real Estate [Member] | Pass [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		2,262,457
Originated three years prior	5,177,727		0
Originated four years prior	0		0
Originated years prior	6,074,672		1,909,140
Revolving	62,212,743		69,980,821
Total loans	73,465,142		74,152,418
Real Estate Loan [Member] | Multi-Family Real Estate [Member] | Special Mention [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	0		0
Total loans	0		0
Real Estate Loan [Member] | Multi-Family Real Estate [Member] | Substandard [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	0		0
Total loans	0		0
Real Estate Loan [Member] | Multi-Family Real Estate [Member] | Doubtful [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	0		0
Total loans	0		0
Real Estate Loan [Member] | Construction Loans [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	33,501,463		43,183,657
Total loans	33,501,463		43,183,657
Originated current year, writeoffs	0		0
Originated prior year, writeoffs	0		0
Originated two years prior, writeoffs	0		0
Originated three years prior, writeoffs	0		0
Originated four years prior, writeoffs	0		0
Originated years prior, writeoffs	0		0
Revolving, writeoffs	0		0
Gross charge-offs by vintage	(0)	(0)	0
Gross charge-offs by vintage	(0)	$ (0)	0
Real Estate Loan [Member] | Construction Loans [Member] | Pass [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	22,607,750		32,289,944
Total loans	22,607,750		32,289,944
Real Estate Loan [Member] | Construction Loans [Member] | Special Mention [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	0		0
Total loans	0		0
Real Estate Loan [Member] | Construction Loans [Member] | Substandard [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	10,893,713		10,893,713
Total loans	10,893,713		10,893,713
Real Estate Loan [Member] | Construction Loans [Member] | Doubtful [Member]
Originated current year	0		0
Originated prior year	0		0
Originated two years prior	0		0
Originated three years prior	0		0
Originated four years prior	0		0
Originated years prior	0		0
Revolving	0		0
Total loans	0		0
Real Estate Loan [Member] | Commercial and Industrial [Member]
Total loans	$ 5,070,847		$ 6,163,747

X

- Definition

Amount of writeoff of financing receivable, charged against allowance for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B

Reference 3: 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 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amortized cost of financing receivable originated more than five years prior to current fiscal year. Excludes 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 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amortized cost of financing receivable originated four years prior to current fiscal year. Excludes 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 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amortized cost of financing receivable originated in current fiscal year. Excludes 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 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amortized cost of financing receivable originated in fiscal year prior to current fiscal year. Excludes 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 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amount of writeoff of financing receivable originated more than five years before current fiscal year. Excludes 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 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amortized cost of financing receivable originated three years prior to current fiscal year. Excludes 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 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amortized cost of financing receivable originated two years prior to current fiscal year. Excludes 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 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amortized cost of financing receivable that can be withdrawn, repaid, and redrawn.

+ References

Reference 1: 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 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amount of writeoff of financing receivable that can be withdrawn, repaid, and redrawn.

+ References

Reference 1: 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 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amount of writeoff of financing receivable originated four years before current fiscal year. Excludes 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 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amount of writeoff of financing receivable originated three years before current fiscal year. Excludes 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 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amount of writeoff of financing receivable originated in current fiscal year. Excludes 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 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amount of writeoff of financing receivable originated two years before current fiscal year. Excludes 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 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amount of writeoff of financing receivable originated in fiscal year before current fiscal year. Excludes 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 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- 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/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 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 948
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477011/948-310-45-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-13

Reference 5: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-7A

Reference 6: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-29

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (1)
-Publisher SEC

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (2)
-Publisher SEC

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Regulation S-K (SK)
-Number 229
-Section 1404
-Paragraph a
-Publisher SEC

Reference 10: 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 11: 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 12: 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 13: 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 14: 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

X

- Details

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

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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