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Inventories (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jan. 31, 2025 USD ($) | Jan. 31, 2025 USD ($) inventory | Jan. 31, 2024 USD ($) | Jul. 31, 2024 USD ($)
Inventory [Line Items] |  |  |  |
Raw materials and components | $ 70,600,000 | $ 70,600,000 |  | $ 72,820,000
Work-in-process and finished goods | 38,324,000 | 38,324,000 |  | 38,587,000
Total inventories | 108,924,000 | 108,924,000 |  | 111,407,000
Less reserve for excess and obsolete inventories | 27,523,000 | 27,523,000 |  | 18,271,000
Inventories, net | 81,401,000 | 81,401,000 |  | 93,136,000
Inventory directly related to long-term contracts | 3,026,000 | 3,026,000 |  | 2,869,000
Inventory related to contracts from third party commercial customers who outsource their manufacturing to us | 2,028,000 | 2,028,000 |  | $ 2,204,000
Provision for excess and obsolete inventory |  | $ 13,534,000 | $ 1,473,000 |
Inventory related, number of inventory written-off | inventory |  | 70 |  |
Inventory, Work in Process, Write-down | 1,082,000 | $ 1,082,000 |  |
Cost of sales |  |  |  |
Inventory [Line Items] |  |  |  |
Provision for excess and obsolete inventory | $ 11,369,000 |  |  |

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