Note 9 - Net Loss Per Share Attributable to Common Shareholders - Anti-dilutive Stocks (Details) - shares |
3 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Share-Based Payment Arrangement, Option [Member] | ||
| Antidilutive Securities (in shares) | 1,962,677 | 2,106,895 |
| Warrant [Member] | ||
| Antidilutive Securities (in shares) | 860,206 | 804,533 |
| Series C Convertible Preferred Stock [Member] | ||
| Antidilutive Securities (in shares) | 0 | 38,889 |
| Restricted Stock [Member] | ||
| Antidilutive Securities (in shares) | 174,680 | 0 |