Note 4 - Loans Receivable, Net - Aging of Recorded Investment (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Loans	$ 700,637	$ 634,496
Financial Asset, 30 to 59 Days Past Due [Member]
Loans	8,872	3,275
Financial Asset, 60 to 89 Days Past Due [Member]
Loans	1,182	769
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	2,540	1,288
Financial Asset, Past Due [Member]
Loans	12,594	5,332
Financial Asset, Not Past Due [Member]
Loans	688,043	629,164
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans	109,928	104,508
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	3,755	971
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	35	0
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	1,156	643
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, Past Due [Member]
Loans	4,946	1,614
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	104,982	102,894
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member]
Loans	203,650	172,883
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	2,038	1,103
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	864	47
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	382	240
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, Past Due [Member]
Loans	3,284	1,390
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, Not Past Due [Member]
Loans	200,366	171,493
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member]
Loans	288,509	264,802
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	1,708	500
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	140	519
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	630	336
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, Past Due [Member]
Loans	2,478	1,355
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, Not Past Due [Member]
Loans	286,031	263,447
Commercial and Agricultural Loans [Member]
Loans	36,870	33,286
Commercial and Agricultural Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	991	81
Commercial and Agricultural Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	0	1
Commercial and Agricultural Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	305	2
Commercial and Agricultural Loans [Member] | Financial Asset, Past Due [Member]
Loans	1,296	84
Commercial and Agricultural Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	35,574	33,202
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Loans	37,837	34,497
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	164
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	26
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	21	21
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, Past Due [Member]
Loans	211	432
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, Not Past Due [Member]
Loans	37,626	34,065
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans	23,843	24,520
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	216	273
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	117	138
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	46	46
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Past Due [Member]
Loans	379	457
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	$ 23,464	24,063
Commercial Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans		347
Commercial Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans		$ 64