Note 9 - Fair Value Measurements - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
|
| Fair Value | $ 608 | $ 707 |
| Total Losses | 0 | 0 |
| Fair Value, Inputs, Level 1 [Member] | ||
| Fair Value | 0 | 0 |
| Fair Value, Inputs, Level 2 [Member] | ||
| Fair Value | 0 | 0 |
| Fair Value, Inputs, Level 3 [Member] | ||
| Fair Value | 608 | 707 |
| Impaired Loans [Member] | Commercial Portfolio Segment [Member] | ||
| Fair Value | 608 | 707 |
| Total Losses | 0 | 0 |
| Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | ||
| Fair Value | 0 | 0 |
| Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | ||
| Fair Value | 0 | 0 |
| Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | ||
| Fair Value | $ 608 | $ 707 |