Note 4 - Fair-value Measurements - Embedded Derivative Assumptions (Details) - Conversion Option Derivative [Member] - The 2029 Notes [Member] |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Measurement Input, Share Price [Member] | ||
| Derivative, assumption | 10.56 | 17.18 |
| Measurement Input, Discount Rate [Member] | ||
| Derivative, assumption | 0.1855 | 0.1803 |
| Measurement Input, Risk Free Interest Rate [Member] | ||
| Derivative, assumption | 0.0375 | 0.0353 |
| Measurement Input, Price Volatility [Member] | ||
| Derivative, assumption | 0.70 | 0.75 |
| Measurement Input, Expected Dividend Rate [Member] | ||
| Derivative, assumption | 0 | 0 |
| Measurement Input, Expected Term [Member] | ||
| Derivative, assumption | 3.2 | 3.5 |