Note 4 - Equity - Common Stock Purchase Warrant Activity (Details) - $ / shares |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Outstanding, warrants (in shares) | 1,319,696 | 39,633 |
| Outstanding, weighted average exercise price (in dollars per share) | $ 24.4 | $ 503.75 |
| Warrants cancelled or expired, warrants (in shares) | 13 | 0 |
| Warrants cancelled or expired, weighted average exercise price (in dollars per share) | $ 14,440 | $ 0 |
| Outstanding, warrants (in shares) | 1,319,683 | 39,633 |
| Outstanding, weighted average exercise price (in dollars per share) | $ 24.26 | $ 503.75 |