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Disposition - Narrative (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 07, 2023 | Oct. 31, 2024 | Oct. 31, 2023 | Jul. 31, 2024 | Jul. 31, 2023 | Jul. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Gain (loss) on disposition of business |  | $ (1,199,000) |  |  |  |
Net sales |  | 115,800,000 | $ 151,911,000 |  |  |
Operating income (loss) |  | (129,170,000) | $ 2,086,000 | $ (79,890,000) | $ (14,660,000) | $ (33,752,000)
Less reserve for excess and obsolete inventories |  | 30,446,000 |  | 18,271,000 |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Solid-State RF Microwave High Power Amplifiers and Control Components Product Line |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Divestiture preliminary purchase price | $ 35,459,000 |  |  |  |  |
Proceeds from divestiture | $ 33,277,000 |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | CGC Technology Limited |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Net sales |  |  |  | 4,001,000 | 9,969,000 | 11,188,000
Operating income (loss) |  |  |  | $ 32,331,000 | $ 8,203,000 | $ 9,897,000
Reversed revenue |  | 4,157,000 |  |  |  |
Reversed contract costs |  | 1,403,000 |  |  |  |
Restructuring charges |  | 4,925,000 |  |  |  |
Less reserve for excess and obsolete inventories |  | $ 2,948,000 |  |  |  |

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