Note 2 - Convertible Notes Payable - Schedule of Detachable Warrants (Details) - $ / shares |
Dec. 31, 2025 |
Mar. 31, 2025 |
|---|---|---|
| Balance, outstanding (in shares) | 25,003 | 25,003 |
| Outstanding, weighted average exercise price (in dollars per share) | $ 20 | $ 20 |