Note 4 - Marketable Securities - Schedule of Marketable Securities (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Unrealized gains, net | $ 393 | $ 0 | $ 393 | $ 0 |
| Realized losses | $ (15) | $ 0 | $ (15) | $ 0 |