Note 11 - Net Loss Per Share (Details Textual) - $ / shares |
12 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Share-Based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit (in dollars per share) | $ 5.5 | $ 7.47 |
| Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in dollars per share) | $ 175.5 | $ 175.5 |
| Restricted Stock [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 0 | 0 |
| Share-Based Payment Arrangement, Option [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 213,113 | 156,628 |