Note 8 - Equity Warrants - Warrant Activity (Details) - $ / shares |
3 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Mar. 31, 2026 |
|
| Balance, shares (in shares) | 14 | 14 |
| Balance, weighted average exercise price (in dollars per share) | $ 77,965 | $ 77,965 |
| Granted/Increase to existing warrants, shares (in shares) | 0 | 0 |
| Granted/Increase to existing warrants, weighted average exercise price (in dollars per share) | $ 0 | $ 0 |
| Exercised, shares (in shares) | 0 | 0 |
| Exercised, weighted average exercise price (in dollars per share) | $ 0 | $ 0 |
| Expired or forfeited, shares (in shares) | (5) | 0 |
| Expired or forfeited, weighted average exercise price (in dollars per share) | $ 0 | $ 0 |
| Balance, shares (in shares) | 9 | 14 |
| Balance, weighted average exercise price (in dollars per share) | $ 33,622 | $ 77,965 |