Note 9 - Fair Value Disclosures (Details Textual) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Other Investment Sold, Gain (Loss), Fair Value | $ (156,783) | $ (62,560) | $ (92,931) |
| Other Investment Sold, Not yet Purchased, Gain (Loss) | $ 1,118 | $ 29,658 | $ 107,816 |