Note 8 - Loans Receivable, Net - Aging of Recorded Investment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Loans	$ 659,132	$ 634,496
Financial Asset, 30 to 59 Days Past Due [Member]
Loans	2,872	3,275
Financial Asset, 60 to 89 Days Past Due [Member]
Loans	381	769
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	1,406	1,288
Financial Asset, Past Due [Member]
Loans	4,659	5,332
Financial Asset, Not Past Due [Member]
Loans	654,473	629,164
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans	114,769	104,508
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	551	971
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	0	0
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	631	643
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, Past Due [Member]
Loans	1,182	1,614
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	113,587	102,894
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member]
Loans	187,146	172,883
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	1,381	1,103
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	137	47
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	61	240
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, Past Due [Member]
Loans	1,579	1,390
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, Not Past Due [Member]
Loans	185,567	171,493
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member]
Loans	267,585	264,802
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	262	500
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	14	519
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	607	336
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, Past Due [Member]
Loans	883	1,355
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, Not Past Due [Member]
Loans	266,702	263,447
Commercial and Agricultural Loans [Member]
Loans	28,919	33,286
Commercial and Agricultural Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	369	81
Commercial and Agricultural Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	59	1
Commercial and Agricultural Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	2	2
Commercial and Agricultural Loans [Member] | Financial Asset, Past Due [Member]
Loans	430	84
Commercial and Agricultural Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	28,489	33,202
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Loans	36,201	34,497
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	147	347
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	97	64
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	265	432
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, Not Past Due [Member]
Loans	35,936	34,065
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans	24,512	24,520
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	162	273
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	74	138
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	84	46
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Past Due [Member]
Loans	320	457
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	$ 24,192	$ 24,063