Note 9 - Warrants - Warrants Outstanding and Activity (Details) - $ / shares |
9 Months Ended | |
|---|---|---|
Sep. 30, 2022 |
Jun. 30, 2022 |
|
| Balance (in shares) | 0 | |
| Issued (in shares) | 23,307,694 | |
| Exercised (in shares) | 7,153,847 | |
| Expired (in shares) | 0 | |
| Balance (in shares) | 16,153,847 | |
| Warrants [Member] | ||
| Exercise price (in dollars per share) | $ 1.31 | |
| Balance (in shares) | 0 | |
| Issued (in shares) | 16,153,847 | |
| Exercised (in shares) | 0 | |
| Expired (in shares) | 0 | |
| Balance (in shares) | 16,153,847 | |
| Prefunded Warrant [Member] | ||
| Exercise price (in dollars per share) | $ 0.0001 | |
| Balance (in shares) | 0 | |
| Issued (in shares) | 7,153,847 | |
| Exercised (in shares) | 7,153,847 | |
| Expired (in shares) | 0 | |
| Balance (in shares) | 0 |