Note 6 - Investments - Net Realized and Unrealized Gains on Investments, Limited Liability Investment (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 18 Months Ended | ||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
|
| Net realized gains | $ 1,953 | $ 128 | $ 1,964 | $ 57 | $ 57 |
| Fixed Maturities [Member] | |||||
| Gross realized gains | 0 | 0 | 0 | 0 | |
| Gross realized losses | 0 | (4) | 0 | (76) | |
| Net realized losses on available-for-sale fixed maturities | 0 | (4) | 0 | (76) | |
| Limited Liability Investments, Fair Value [Member] | |||||
| Net realized losses on available-for-sale fixed maturities | 1,320 | 95 | 1,330 | 95 | |
| Private Company Investments [Member] | |||||
| Net realized losses on available-for-sale fixed maturities | $ 633 | $ 37 | $ 634 | $ 38 | |