Note 10 - Financial Instrument Commitments (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Commitments And Contingencies Disclosure [Line Items] | ||
| Total financial instrument commitments | $ 430,487 | $ 420,595 |
| Commitments to Extend Credit [Member] | ||
| Commitments And Contingencies Disclosure [Line Items] | ||
| Total financial instrument commitments | 412,756 | 401,073 |
| Standby Letters of Credit [Member] | ||
| Commitments And Contingencies Disclosure [Line Items] | ||
| Total financial instrument commitments | $ 17,731 | $ 19,522 |