Note 8 - Long Term Investments (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |
Feb. 28, 2026 |
May 31, 2025 |
|---|---|---|
| Equity Securities without Readily Determinable Fair Value, Amount | $ 4,364 | $ 8,160 |
| Superhero Acquisition LP [Member] | ||
| Equity Securities without Readily Determinable Fair Value, Amount | $ 4,364 | $ 8,160 |
| Superhero Acquisition LP [Member] | Upon U.S. Federal Cannabis Legalization [Member] | ||
| Subsidiary, Ownership Percentage, Parent | 68.00% | 68.00% |
| Equity Investment, Strike Price (in dollars per share) | $ 1 | $ 1 |