Note 2 - Summary of Significant Accounting Policies - Securities Excluded from Calculation of Earnings Per Share (Details) - shares |
12 Months Ended | |
|---|---|---|
Jun. 30, 2024 |
Jun. 30, 2023 |
|
| Securites excluded (in shares) | 6,249,554 | 6,636,773 |
| Liability Warrants [Member] | ||
| Securites excluded (in shares) | 6,057,766 | 6,498,980 |
| Equity Warrants [Member] | ||
| Securites excluded (in shares) | 18,114 | 39,072 |
| Share-Based Payment Arrangement, Option [Member] | ||
| Securites excluded (in shares) | 146,539 | 52,762 |
| Restricted Stock [Member] | ||
| Securites excluded (in shares) | 25,360 | 40,996 |
| Restricted Stock Units (RSUs) [Member] | ||
| Securites excluded (in shares) | 1,775 | 4,963 |