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Inventories - Components of Inventories (Detail) - USD ($) $ in Thousands | Apr. 30, 2026 | Jan. 31, 2026
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Inventory Disclosure [Abstract] |  |
Materials and Supplies | $ 31,466 | $ 29,929
Work-In-Process | 1,647 | 2,549
Finished Goods | 19,575 | 19,493
Inventory, Gross | 52,688 | 51,971
Inventory Reserve | (8,762) | (8,719)
Inventories | $ 43,926 | $ 43,252

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