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Inventories (Details) - USD ($) | Jul. 31, 2024 | Jul. 31, 2023
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Inventory Disclosure [Abstract] |  |
Raw materials and components | $ 72,820,000 | $ 87,139,000
Work-in-process and finished goods | 38,587,000 | 43,365,000
Total inventories | 111,407,000 | 130,504,000
Less reserve for excess and obsolete inventories | 18,271,000 | 24,659,000
Inventories, net | 93,136,000 | 105,845,000
Inventory directly related to long-term contracts | 2,869,000 | 5,911,000
Inventory related to contracts from third party commercial customers who outsource their manufacturing to us | $ 2,204,000 | $ 3,277,000

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