Note 10 - Stockholders' Equity - Warrants (Details) - shares |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Outstanding (in shares) | 11,391,225 | 11,391,225 |
| Warrants issued in connection with public offering and private placement (in shares) | 800,000 | 0 |
| Outstanding (in shares) | 12,191,225 | 11,391,225 |