Note 5 - Intangible Assets (Details Textual) - USD ($) $ in Thousands |
Feb. 28, 2026 |
May 31, 2025 |
|---|---|---|
| Intangible Assets, Net (Excluding Goodwill), Accumulated Impairment | $ 1,263,760 | |
| Customer Relationships and Distribution Channel [Member] | ||
| Intangible Assets, Net (Excluding Goodwill), Accumulated Impairment | $ 444,208 | 444,208 |
| Licenses, Permits and Applications [Member] | ||
| Intangible Assets, Net (Excluding Goodwill), Accumulated Impairment | 367,022 | 367,022 |
| Intellectual Property, Trademarks, Know How and Brands [Member] | ||
| Intangible Assets, Net (Excluding Goodwill), Accumulated Impairment | $ 452,530 | $ 452,530 |