Note 1 - Business Description and Significant Accounting Policies - Schedule of Inventory (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Beginning balance, inventory | $ 882 | $ 930 |
| Beginning balance, reserve | (882) | (691) |
| Purchases, inventory | 50 | 163 |
| Sales, inventory | (82) | (211) |
| Sales, reserve | 33 | 0 |
| Reserve adjustments, reserve | (1) | (191) |
| Ending balance, inventory | 850 | 882 |
| Ending balance, reserve | $ (850) | $ (882) |