Property, Plant, and Equipment (Details) - USD ($) $ in Thousands |
Apr. 30, 2025 |
Jan. 31, 2025 |
Apr. 30, 2024 |
|---|---|---|---|
| Property, Plant and Equipment [Line Items] | |||
| Property, plant and equipment, gross | $ 178,544 | $ 177,096 | $ 171,738 |
| Less accumulated depreciation and amortization | (142,062) | (140,668) | (137,664) |
| Property, plant, and equipment, net | 36,482 | 36,428 | 34,074 |
| 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 | 694 |
| Buildings and building improvements | |||
| Property, Plant and Equipment [Line Items] | |||
| Property, plant and equipment, gross | 52,050 | 52,030 | 51,575 |
| Machinery and equipment | |||
| Property, Plant and Equipment [Line Items] | |||
| Property, plant and equipment, gross | 121,400 | 119,972 | 115,215 |
| Leasehold improvements | |||
| Property, Plant and Equipment [Line Items] | |||
| Property, plant and equipment, gross | $ 657 | $ 657 | $ 523 |