Note 4 - Loans - Schedule of Nonaccrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Nonaccrual, no allowance	$ 22,893	$ 6,524
Nonaccrual, with allowance	20,181	19,338
Nonaccrual over 89 days and accruing	4,864	353
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member]
Nonaccrual, no allowance	4,167	1,346
Nonaccrual, with allowance	2,775	207
Nonaccrual over 89 days and accruing	0	0
Commercial Real Estate Portfolio Segment [Member] \| Nonowner Occupied [Member]
Nonaccrual, no allowance	8,116	2,408
Nonaccrual, with allowance	3,191	10,776
Nonaccrual over 89 days and accruing	0	0
Commercial Real Estate Portfolio Segment [Member] \| Farmland [Member]
Nonaccrual, no allowance	0	0
Nonaccrual, with allowance	1,811	1,917
Nonaccrual over 89 days and accruing	0	0
Commercial Real Estate Portfolio Segment [Member] \| Other Loans [Member]
Nonaccrual, no allowance	1,430	1,093
Nonaccrual, with allowance	3,499	0
Nonaccrual over 89 days and accruing	4,426	0
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member]
Nonaccrual, no allowance	6,726	0
Nonaccrual, with allowance	3,561	2,778
Nonaccrual over 89 days and accruing	0	82
Commercial Portfolio Segment [Member] \| Agricultural [Member]
Nonaccrual, no allowance	0	0
Nonaccrual, with allowance	145	159
Nonaccrual over 89 days and accruing	0	0
Residential Portfolio Segment [Member] \| 1-4 Family Residential [Member]
Nonaccrual, no allowance	2,128	1,095
Nonaccrual, with allowance	3,375	2,329
Nonaccrual over 89 days and accruing	377	271
Residential Portfolio Segment [Member] \| Home Equity Loan [Member]
Nonaccrual, no allowance	297	424
Nonaccrual, with allowance	853	689
Nonaccrual over 89 days and accruing	30	0
Consumer Portfolio Segment [Member] \| Other Loans [Member]
Nonaccrual, no allowance	0	97
Nonaccrual, with allowance	97	0
Nonaccrual over 89 days and accruing	1	0
Consumer Portfolio Segment [Member] \| Indirect Loans [Member]
Nonaccrual, no allowance	29	61
Nonaccrual, with allowance	820	462
Nonaccrual over 89 days and accruing	30	0
Consumer Portfolio Segment [Member] \| Direct Loans [Member]
Nonaccrual, no allowance	0	0
Nonaccrual, with allowance	54	21
Nonaccrual over 89 days and accruing	$ 0	$ 0