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Note 4 - Loans Receivable - Aging of the Recorded Investment of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Loans receivable	$ 895,157	$ 1,059,106
Loans receivable, nonaccrual	16,934	21,331
Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Loans receivable	14,829	18,945
Loans receivable, nonaccrual	126	37
Real Estate Portfolio [Member] | Multi-family Residential Real Estate [Member]
Loans receivable	521,957
Loans receivable, nonaccrual	1,453
Real Estate Portfolio [Member] | Multi-family Mortgage [Member]
Loans receivable	521,957	527,460
Loans receivable, nonaccrual	1,453	0
Real Estate Portfolio [Member] | Nonresidential Real Estate, Owner Occupied [Member]
Loans receivable	108,153
Loans receivable, nonaccrual	393
Real Estate Portfolio [Member] | Nonresidential Real Estate [Member]
Loans receivable	108,153	118,016
Loans receivable, nonaccrual	393	0
Commercial Loans and Leases [Member] | Commercial Loans [Member]
Loans receivable	248,595	393,321
Loans receivable, nonaccrual	14,960	21,294
Consumer Portfolio Segment [Member]
Loans receivable	1,623	1,364
Loans receivable, nonaccrual	2	0
Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	2,883	3,408
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Loans receivable	181	12
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Portfolio [Member] | Multi-family Residential Real Estate [Member]
Loans receivable	654
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Portfolio [Member] | Multi-family Mortgage [Member]
Loans receivable		0
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Portfolio [Member] | Nonresidential Real Estate, Owner Occupied [Member]
Loans receivable	0
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Portfolio [Member] | Nonresidential Real Estate [Member]
Loans receivable		0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Loans and Leases [Member] | Commercial Loans [Member]
Loans receivable	2,044	3,388
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Loans receivable	4	8
Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	1,934	5,077
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Loans receivable	0	18
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Portfolio [Member] | Multi-family Residential Real Estate [Member]
Loans receivable	0
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Portfolio [Member] | Multi-family Mortgage [Member]
Loans receivable		0
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Portfolio [Member] | Nonresidential Real Estate, Owner Occupied [Member]
Loans receivable	0
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Portfolio [Member] | Nonresidential Real Estate [Member]
Loans receivable		0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Loans and Leases [Member] | Commercial Loans [Member]
Loans receivable	1,929	5,054
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Loans receivable	5	5
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	1,007
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Loans receivable	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate Portfolio [Member] | Multi-family Residential Real Estate [Member]
Loans receivable	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate Portfolio [Member] | Multi-family Mortgage [Member]
Loans receivable		0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate Portfolio [Member] | Nonresidential Real Estate, Owner Occupied [Member]
Loans receivable	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate Portfolio [Member] | Nonresidential Real Estate [Member]
Loans receivable		0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Loans and Leases [Member] | Commercial Loans [Member]
Loans receivable	0	1,007
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Loans receivable	0	0
Financial Asset, Past Due [Member]
Loans receivable	4,817	9,492
Financial Asset, Past Due [Member] | Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Loans receivable	181	30
Financial Asset, Past Due [Member] | Real Estate Portfolio [Member] | Multi-family Residential Real Estate [Member]
Loans receivable	654
Financial Asset, Past Due [Member] | Real Estate Portfolio [Member] | Multi-family Mortgage [Member]
Loans receivable		0
Financial Asset, Past Due [Member] | Real Estate Portfolio [Member] | Nonresidential Real Estate, Owner Occupied [Member]
Loans receivable	0
Financial Asset, Past Due [Member] | Real Estate Portfolio [Member] | Nonresidential Real Estate [Member]
Loans receivable		0
Financial Asset, Past Due [Member] | Commercial Loans and Leases [Member] | Commercial Loans [Member]
Loans receivable	3,973	9,449
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member]
Loans receivable	9	13
Financial Asset, Not Past Due [Member]
Loans receivable	873,406	1,028,283
Financial Asset, Not Past Due [Member] | Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Loans receivable	14,522	18,878
Financial Asset, Not Past Due [Member] | Real Estate Portfolio [Member] | Multi-family Residential Real Estate [Member]
Loans receivable	519,850
Financial Asset, Not Past Due [Member] | Real Estate Portfolio [Member] | Multi-family Mortgage [Member]
Loans receivable		527,460
Financial Asset, Not Past Due [Member] | Real Estate Portfolio [Member] | Nonresidential Real Estate, Owner Occupied [Member]
Loans receivable	107,760
Financial Asset, Not Past Due [Member] | Real Estate Portfolio [Member] | Nonresidential Real Estate [Member]
Loans receivable		118,016
Financial Asset, Not Past Due [Member] | Commercial Loans and Leases [Member] | Commercial Loans [Member]
Loans receivable	229,662	362,578
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member]
Loans receivable	$ 1,612	$ 1,351

X

- Definition

Amortized cost, before allowance for credit loss, fee, and loan in process, 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 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

Reference 2: 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

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

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X

- Definition

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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-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)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (3)
-Publisher SEC

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
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-Subparagraph (2)
-Publisher SEC

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Publisher FASB
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