Note 1 - Description of the Business, Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Anti-dilutive Securities (Details) - shares |
3 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Antidilutive securities (in shares) | 512,394 | 94,601 |
| Warrant [Member] | ||
| Antidilutive securities (in shares) | 209 | 4,173 |
| Bridge Financing Warrants in Connection with Convertible Notes [Member[ | ||
| Antidilutive securities (in shares) | 1,194 | 1,194 |
| Share-Based Payment Arrangement, Option [Member] | ||
| Antidilutive securities (in shares) | 645 | 11,842 |
| Series A Warrants [Member] | ||
| Antidilutive securities (in shares) | 2,643 | 73,009 |
| Series B Warrants [Member] | ||
| Antidilutive securities (in shares) | 70,366 | 0 |
| Series C Warrants [Member] | ||
| Antidilutive securities (in shares) | 428,731 | 0 |
| Representative's Warrants [Member] | ||
| Antidilutive securities (in shares) | 8,606 | 4,383 |