Note 4 - Loans Receivable, Net - Aging of Recorded Investment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Loans	$ 634,496	$ 560,988
Financial Asset, 30 to 59 Days Past Due [Member]
Loans	3,275	4,705
Financial Asset, 60 to 89 Days Past Due [Member]
Loans	769	170
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	1,288	1,072
Financial Asset, Past Due [Member]
Loans	5,332	5,947
Financial Asset, Not Past Due [Member]
Loans	629,164	555,041
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans	104,508	112,794
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	971	0
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans		0
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	643	100
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, Past Due [Member]
Loans	1,614	100
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	102,894	112,694
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member]
Loans	172,883	110,057
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	1,103	1,557
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	47	0
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	240	472
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, Past Due [Member]
Loans	1,390	2,029
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Financial Asset, Not Past Due [Member]
Loans	171,493	108,028
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member]
Loans	264,802	252,154
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	500	2,671
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	519	89
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	336	354
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, Past Due [Member]
Loans	1,355	3,114
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, Not Past Due [Member]
Loans	263,447	249,040
Commercial and Agricultural Loans [Member]
Loans	33,286	30,648
Commercial and Agricultural Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	81	6
Commercial and Agricultural Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	1	2
Commercial and Agricultural Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	2	55
Commercial and Agricultural Loans [Member] | Financial Asset, Past Due [Member]
Loans	84	63
Commercial and Agricultural Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	33,202	30,585
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Loans	34,497	31,737
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	347	199
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	64	0
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	21	74
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, Past Due [Member]
Loans	432	273
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Financial Asset, Not Past Due [Member]
Loans	34,065	31,464
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans	24,520	23,598
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	273	272
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	138	79
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	46	17
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Past Due [Member]
Loans	457	368
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	$ 24,063	$ 23,230