Note 4 - Loans, Allowance for Credit Losses and Other Real Estate Owned - Loans by Delinquency and Nonaccrual Status (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Loans	$ 696,204	$ 726,482
Nonaccrual	1,165	1,474
Commercial Portfolio Segment [Member]
Loans	108,476	117,009
Nonaccrual	785	1,095
Commercial Real Estate Portfolio Segment [Member]
Loans	471,961	482,230
Nonaccrual	380	379
Construction Portfolio Segment [Member]
Loans	0	0
Nonaccrual	0	0
Residential Portfolio Segment [Member]
Loans	6,601	7,186
Nonaccrual	0	0
Consumer Portfolio Segment [Member]
Loans	109,166	120,057
Nonaccrual	0	0
Financial Asset, Not Past Due [Member]
Loans	690,925	721,102
Financial Asset, Not Past Due [Member] \| Commercial Portfolio Segment [Member]
Loans	107,447	115,595
Financial Asset, Not Past Due [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans	469,992	481,664
Financial Asset, Not Past Due [Member] \| Construction Portfolio Segment [Member]
Loans	0	0
Financial Asset, Not Past Due [Member] \| Residential Portfolio Segment [Member]
Loans	6,601	7,186
Financial Asset, Not Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	106,885	116,657
Financial Asset, 30 to 59 Days Past Due [Member]
Loans	3,392	2,910
Financial Asset, 30 to 59 Days Past Due [Member] \| Commercial Portfolio Segment [Member]
Loans	244	295
Financial Asset, 30 to 59 Days Past Due [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans	1,501	187
Financial Asset, 30 to 59 Days Past Due [Member] \| Construction Portfolio Segment [Member]
Loans	0	0
Financial Asset, 30 to 59 Days Past Due [Member] \| Residential Portfolio Segment [Member]
Loans	0	0
Financial Asset, 30 to 59 Days Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	1,647	2,428
Financial Asset, 60 to 89 Days Past Due [Member]
Loans	445	656
Financial Asset, 60 to 89 Days Past Due [Member] \| Commercial Portfolio Segment [Member]
Loans	0	24
Financial Asset, 60 to 89 Days Past Due [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans	88	0
Financial Asset, 60 to 89 Days Past Due [Member] \| Construction Portfolio Segment [Member]
Loans	0	0
Financial Asset, 60 to 89 Days Past Due [Member] \| Residential Portfolio Segment [Member]
Loans	0	0
Financial Asset, 60 to 89 Days Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	357	632
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	277	340
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| Commercial Portfolio Segment [Member]
Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| Construction Portfolio Segment [Member]
Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| Residential Portfolio Segment [Member]
Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	$ 277	$ 340