Note 10 - Fair Value of Financial Instruments - Financial Assets and Financial Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Impaired loans | $ 58 | $ 189 |
| Other real estate owned and other repossessed assets | 41 | |
| Fair Value, Inputs, Level 1 [Member] | ||
| Impaired loans | 0 | 0 |
| Other real estate owned and other repossessed assets | 0 | |
| Fair Value, Inputs, Level 2 [Member] | ||
| Impaired loans | 0 | 0 |
| Other real estate owned and other repossessed assets | 0 | |
| Fair Value, Inputs, Level 3 [Member] | ||
| Impaired loans | 58 | $ 189 |
| Other real estate owned and other repossessed assets | $ 41 |