Note 6 - Realized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Investments, Debt and Equity Securities [Abstract] | ||||
| Gross realized gains | $ 0 | $ 0 | $ 0 | $ 0 |
| Gross realized losses | 0 | (1,096) | 0 | (1,096) |
| Impairment | 0 | 0 | 0 | 0 |
| Total net gains (losses) on AFS securities | $ 0 | $ (1,096) | $ 0 | $ (1,096) |