Note 6 - Investments - Net Realized and Unrealized Gains on Investments, Limited Liability Investment (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | 21 Months Ended | ||
|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
|
| Net realized (losses) gains | $ (257) | $ (5) | $ 1,707 | $ 52 | $ 52 |
| Fixed Maturities [Member] | |||||
| Gross realized gains | 0 | 0 | 0 | 0 | |
| Gross realized losses | 0 | (9) | 0 | (85) | |
| Net realized losses on available-for-sale fixed maturities | 0 | (9) | 0 | (85) | |
| Limited Liability Investments, Fair Value [Member] | |||||
| Net realized losses on available-for-sale fixed maturities | (266) | 34 | 1,064 | 129 | |
| Private Company Investments [Member] | |||||
| Net realized losses on available-for-sale fixed maturities | $ 9 | $ (30) | $ 643 | $ 8 | |