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