Note 10 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Mar. 31, 2026 |
|---|---|---|
| Property, plant and equipment, gross | $ 151,052 | $ 140,487 |
| Less accumulated depreciation | (52,297) | (50,712) |
| Property, plant and equipment, net | 98,755 | 89,775 |
| Land [Member] | ||
| Property, plant and equipment, gross | 41,595 | 37,770 |
| Construction in Progress [Member] | ||
| Property, plant and equipment, gross | 2,435 | 1,482 |
| Building [Member] | ||
| Property, plant and equipment, gross | 34,894 | 30,989 |
| Equipment and Software [Member] | ||
| Property, plant and equipment, gross | 61,810 | 60,030 |
| Furniture and Fixtures [Member] | ||
| Property, plant and equipment, gross | 2,032 | 1,940 |
| Leasehold Improvements [Member] | ||
| Property, plant and equipment, gross | $ 8,286 | $ 8,276 |