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Note 4 - Loans Receivable - Aging of the Recorded Investment of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Loans receivable	$ 848,334	$ 895,157
Loans receivable, nonaccrual	16,413	16,934
Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Loans receivable	14,090	14,829
Loans receivable, nonaccrual	107	126
Real Estate Portfolio [Member] | Multi-family Residential Real Estate [Member]
Loans receivable	506,498	521,957
Loans receivable, nonaccrual	1,395	1,453
Real Estate Portfolio [Member] | Nonresidential Real Estate, Owner Occupied [Member]
Loans receivable	104,610	108,153
Loans receivable, nonaccrual	0	393
Commercial Loans and Leases [Member] | Commercial Loans [Member]
Loans receivable	221,403	248,595
Loans receivable, nonaccrual	14,911	14,960
Consumer Portfolio Segment [Member]
Loans receivable	1,733	1,623
Loans receivable, nonaccrual	0	2
Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	3,881	2,883
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Loans receivable	209	181
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Portfolio [Member] | Multi-family Residential Real Estate [Member]
Loans receivable	816	654
Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Portfolio [Member] | Nonresidential Real Estate, Owner Occupied [Member]
Loans receivable	0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Loans and Leases [Member] | Commercial Loans [Member]
Loans receivable	2,855	2,044
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Loans receivable	1	4
Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	65	1,934
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Loans receivable	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Portfolio [Member] | Multi-family Residential Real Estate [Member]
Loans receivable	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Portfolio [Member] | Nonresidential Real Estate, Owner Occupied [Member]
Loans receivable	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Loans and Leases [Member] | Commercial Loans [Member]
Loans receivable	63	1,929
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Loans receivable	2	5
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	1	0
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	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	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Loans and Leases [Member] | Commercial Loans [Member]
Loans receivable	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Loans receivable	1	0
Financial Asset, Past Due [Member]
Loans receivable	3,947	4,817
Financial Asset, Past Due [Member] | Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Loans receivable	209	181
Financial Asset, Past Due [Member] | Real Estate Portfolio [Member] | Multi-family Residential Real Estate [Member]
Loans receivable	816	654
Financial Asset, Past Due [Member] | Real Estate Portfolio [Member] | Nonresidential Real Estate, Owner Occupied [Member]
Loans receivable	0	0
Financial Asset, Past Due [Member] | Commercial Loans and Leases [Member] | Commercial Loans [Member]
Loans receivable	2,918	3,973
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member]
Loans receivable	4	9
Financial Asset, Not Past Due [Member]
Loans receivable	827,974	873,406
Financial Asset, Not Past Due [Member] | Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Loans receivable	13,774	14,522
Financial Asset, Not Past Due [Member] | Real Estate Portfolio [Member] | Multi-family Residential Real Estate [Member]
Loans receivable	504,287	519,850
Financial Asset, Not Past Due [Member] | Real Estate Portfolio [Member] | Nonresidential Real Estate, Owner Occupied [Member]
Loans receivable	104,610	107,760
Financial Asset, Not Past Due [Member] | Commercial Loans and Leases [Member] | Commercial Loans [Member]
Loans receivable	203,574	229,662
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member]
Loans receivable	$ 1,729	$ 1,612

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
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Publisher FASB
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