Property, Plant and Equipment (Details) - USD ($) $ in Thousands |
Apr. 30, 2026 |
Jan. 31, 2026 |
Apr. 30, 2025 |
|---|---|---|---|
| Property, Plant, and Equipment [Line Items] | |||
| Property, plant and equipment, gross | $ 180,966 | $ 180,324 | $ 178,544 |
| Less accumulated depreciation and amortization | (147,220) | (145,746) | (142,062) |
| Property, plant and equipment, net | 33,746 | 34,578 | 36,482 |
| Land | |||
| Property, Plant, and Equipment [Line Items] | |||
| Property, plant and equipment, gross | 3,731 | 3,731 | 3,731 |
| Land improvements | |||
| Property, Plant, and Equipment [Line Items] | |||
| Property, plant and equipment, gross | 706 | 706 | 706 |
| Buildings and building improvements | |||
| Property, Plant, and Equipment [Line Items] | |||
| Property, plant and equipment, gross | 52,059 | 52,059 | 52,050 |
| Machinery and equipment | |||
| Property, Plant, and Equipment [Line Items] | |||
| Property, plant and equipment, gross | 123,821 | 123,179 | 121,400 |
| Leasehold improvements | |||
| Property, Plant, and Equipment [Line Items] | |||
| Property, plant and equipment, gross | $ 649 | $ 649 | $ 657 |
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- Definition Amount of accumulated depreciation, depletion, and amortization of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before accumulated depreciation, depletion, and amortization, of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, after accumulated depreciation, depletion, and amortization, of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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