Note 4 - Loans, Allowance for Credit Losses and Other Real Estate Owned - Loans by Delinquency and Nonaccrual Status (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Loans	$ 668,833	$ 726,482
Nonaccrual	525	1,474
Commercial Portfolio Segment [Member]
Loans	104,806	117,009
Nonaccrual	342	1,095
Commercial Real Estate Portfolio Segment [Member]
Loans	459,198	482,230
Nonaccrual	183	379
Residential Portfolio Segment [Member]
Loans	6,410	7,186
Nonaccrual	0	0
Consumer Portfolio Segment [Member]
Loans	98,419	120,057
Nonaccrual	0	0
Financial Asset, Not Past Due [Member]
Loans	664,603	721,102
Financial Asset, Not Past Due [Member] \| Commercial Portfolio Segment [Member]
Loans	103,651	115,595
Financial Asset, Not Past Due [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans	458,576	481,664
Financial Asset, Not Past Due [Member] \| Residential Portfolio Segment [Member]
Loans	6,410	7,186
Financial Asset, Not Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	95,966	116,657
Financial Asset, 30 to 59 Days Past Due [Member]
Loans	2,339	2,910
Financial Asset, 30 to 59 Days Past Due [Member] \| Commercial Portfolio Segment [Member]
Loans	599	295
Financial Asset, 30 to 59 Days Past Due [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans	0	187
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	1,740	2,428
Financial Asset, 60 to 89 Days Past Due [Member]
Loans	1,083	656
Financial Asset, 60 to 89 Days Past Due [Member] \| Commercial Portfolio Segment [Member]
Loans	214	24
Financial Asset, 60 to 89 Days Past Due [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans	439	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	430	632
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	283	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] \| Residential Portfolio Segment [Member]
Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	$ 283	$ 340