Note 8 - Fair Value Disclosures (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Other Investment Sold, Gain (Loss), Fair Value | $ 8,890 | $ (19,136) | $ (7,329) | $ (48,060) |
| Other Investment Sold, Not yet Purchased, Gain (Loss) | $ 0 | $ 11,573 | $ 802 | $ 20,999 |