INVENTORIES - Schedule of Inventory, Current (Details) - USD ($) $ in Thousands |
Jul. 31, 2026 |
Apr. 30, 2026 |
|---|---|---|
| Schedule Of Inventory Current Abstract | ||
| Raw materials and component parts | $ 14,109 | $ 13,026 |
| Work in progress | 7,659 | 9,205 |
| Finished goods | 438 | 387 |
| Inventories | $ 22,206 | $ 22,618 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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