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Note 4 - Loans Receivable - Recorded Investment in Nonaccrual Loans (Details) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Recorded investment	$ 22,331,000	$ 21,331,000
Loans past due over 90 days, still accruing	0	1,007,000
Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Recorded investment	34,000	37,000
Loans past due over 90 days, still accruing	0	0
Real Estate Portfolio [Member] | Multi-family Mortgage [Member]
Recorded investment	1,458
Loans past due over 90 days, still accruing	0
Real Estate Portfolio [Member] | Nonresidential Real Estate [Member]
Recorded investment	393,000
Loans past due over 90 days, still accruing	0
Commercial Portfolio Segment [Member]
Recorded investment	20,446,000	21,294,000
Loans past due over 90 days, still accruing	$ 0	$ 1,007,000

X

- Definition

Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
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-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

+ Details

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X

- Definition

Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Number 229
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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