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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 20
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Note 4 - Loans and Allowance for Credit Losses - Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Principal loan balance	$ 621,246	$ 563,517
Deferred loan origination fees and costs, net	1,168	1,213
Allowance for credit losses	(8,005)	(6,772)	$ (6,083)	$ (6,625)
Loans, net	614,409	557,958
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member]
Principal loan balance	133,480	116,269
Deferred loan origination fees and costs, net	121
Allowance for credit losses	(1,490)
Residential Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member]
Principal loan balance	62,070	57,872
Residential Portfolio Segment [Member] \| Multifamily [Member]
Principal loan balance	39,963	38,973
Deferred loan origination fees and costs, net	(17)
Allowance for credit losses	(332)
Construction [Member] \| One-to-four Family Residential Construction [Member]
Principal loan balance	15,667	16,575
Deferred loan origination fees and costs, net	0
Allowance for credit losses	(208)
Construction [Member] \| Other Construction, Development and Land [Member]
Principal loan balance	76,713	47,632
Deferred loan origination fees and costs, net	(44)
Allowance for credit losses	(804)
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate Loan [Member]
Principal loan balance	168,757	161,362
Deferred loan origination fees and costs, net	(112)
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member]
Deferred loan origination fees and costs, net	1,231	1,204
Allowance for credit losses	(406)	(530)	(527)	$ (617)
Consumer Portfolio Segment [Member] \| Commercial Business [Member]
Principal loan balance	68,223	68,066
Consumer Portfolio Segment [Member] \| All Other Consumer Excluding Home Equity and Second Mortgage [Member]
Principal loan balance	56,373	56,768
Allowance for credit losses	$ (1,215)	$ (991)	$ (988)