Note 11 - Stockholders' Equity - Warrants (Details) - shares |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Outstanding (in shares) | 11,391,225 | 11,391,225 |
| Warrants issued in connection with public offering and private placement (in shares) | 0 | 0 |
| Outstanding (in shares) | 11,391,225 | 11,391,225 |