Goodwill (Details)	9 Months Ended	12 Months Ended
	Apr. 30, 2024 USD ($) segment $ / shares	Jul. 31, 2023 USD ($) segment	May 01, 2024	Aug. 01, 2023 $ / shares
Goodwill [Roll Forward]
Balance as of July 31, 2023	$ 347,692,000
Balance as of April 30, 2024	$ 333,105,000	$ 347,692,000
Common stock price, decrease, percent	81.40%
Number of operating segments | segment	2	2
Power Systems Technologies (PST)
Goodwill [Roll Forward]
Goodwill, Purchase Accounting Adjustments	$ (14,587,000)
Common Stock
Goodwill [Roll Forward]
Share price (in dollars per share) | $ / shares	$ 1.88			$ 10.09
Satellite and Space Communications
Goodwill [Roll Forward]
Balance as of July 31, 2023	$ 173,602,000
Balance as of April 30, 2024	159,015,000	$ 173,602,000
Percentage of fair value in excess of carrying amount for reporting unit			10.20%	18.30%
Satellite and Space Communications | Power Systems Technologies (PST)
Goodwill [Roll Forward]
Goodwill, Purchase Accounting Adjustments	(14,587,000)
Terrestrial and Wireless Networks
Goodwill [Roll Forward]
Balance as of July 31, 2023	174,090,000
Balance as of April 30, 2024	174,090,000	$ 174,090,000
Percentage of fair value in excess of carrying amount for reporting unit			11.70%	8.90%
Terrestrial and Wireless Networks | Power Systems Technologies (PST)
Goodwill [Roll Forward]
Goodwill, Purchase Accounting Adjustments	$ 0