Note 4 - Loans - Schedule of Nonaccrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Nonaccrual, no allowance	$ 23,925	$ 6,524
Nonaccrual, with allowance	35,661	19,338
Nonaccrual over 89 days and accruing	268	353
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member]
Nonaccrual, no allowance	4,989	1,346
Nonaccrual, with allowance	2,818	207
Nonaccrual over 89 days and accruing	0	0
Commercial Real Estate Portfolio Segment [Member] \| Nonowner Occupied [Member]
Nonaccrual, no allowance	6,773	2,408
Nonaccrual, with allowance	16,680	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	1,879	1,917
Nonaccrual over 89 days and accruing	0	0
Commercial Real Estate Portfolio Segment [Member] \| Other Loans [Member]
Nonaccrual, no allowance	1,576	1,093
Nonaccrual, with allowance	0	0
Nonaccrual over 89 days and accruing	0	0
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member]
Nonaccrual, no allowance	8,074	0
Nonaccrual, with allowance	9,521	2,778
Nonaccrual over 89 days and accruing	0	82
Commercial Portfolio Segment [Member] \| Agricultural [Member]
Nonaccrual, no allowance	0	0
Nonaccrual, with allowance	161	159
Nonaccrual over 89 days and accruing	0	0
Residential Portfolio Segment [Member] \| 1-4 Family Residential [Member]
Nonaccrual, no allowance	1,878	1,095
Nonaccrual, with allowance	3,068	2,329
Nonaccrual over 89 days and accruing	268	271
Residential Portfolio Segment [Member] \| Home Equity Loan [Member]
Nonaccrual, no allowance	506	424
Nonaccrual, with allowance	1,004	689
Nonaccrual over 89 days and accruing	0	0
Consumer Portfolio Segment [Member] \| Other Loans [Member]
Nonaccrual, no allowance	97	97
Nonaccrual, with allowance	0	0
Nonaccrual over 89 days and accruing	0	0
Consumer Portfolio Segment [Member] \| Indirect Loans [Member]
Nonaccrual, no allowance	32	61
Nonaccrual, with allowance	526	462
Nonaccrual over 89 days and accruing	0	0
Consumer Portfolio Segment [Member] \| Direct Loans [Member]
Nonaccrual, no allowance	0	0
Nonaccrual, with allowance	4	21
Nonaccrual over 89 days and accruing	$ 0	$ 0