Note 4 - Loans and the Allowance for Credit Losses - Financial Effect of Loan Modifications (Details) |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Weighted average term extension (Month) | 21 months 9 days | 5 months 3 days |
| Commercial Portfolio Segment [Member] | Commercial Loans [Member] | ||
| Weighted average term extension (Month) | 5 months 3 days | |
| Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | ||
| Weighted average term extension (Month) | 3 months | 5 months 9 days |
| Commercial Real Estate Portfolio Segment [Member] | Commercial Loans [Member] | ||
| Weighted average term extension (Month) | 84 months | 3 months |