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Goodwill (Details)
 12 Months Ended
Jul. 31, 2024
USD ($)
segment
$ / shares
Goodwill [Roll Forward]  
Balance as of July 31, 2023 $ 347,692,000
Goodwill, Ending Balance $ 284,180,000
Number of operating segments | segment 2
Impairment of long-lived assets $ 15,600,000
Impairment of intangible assets, finite-lived 9,925,000
Tangible asset impairment charges 2,651,000
Other asset impairment charges 1,873,000
Operating lease, impairment loss 1,151,000
UHP  
Goodwill [Roll Forward]  
PST Divestiture (14,587,000)
Impairment of long-lived assets, including goodwill $ (48,925,000)
Common Stock  
Goodwill [Roll Forward]  
Share price (in dollars per share) | $ / shares $ 3.17
Satellite and Space Communications  
Goodwill [Roll Forward]  
Balance as of July 31, 2023 $ 173,602,000
Goodwill, Ending Balance 110,090,000
Satellite and Space Communications | UHP  
Goodwill [Roll Forward]  
PST Divestiture (14,587,000)
Impairment of long-lived assets, including goodwill (48,925,000)
Terrestrial and Wireless Networks  
Goodwill [Roll Forward]  
Balance as of July 31, 2023 174,090,000
Goodwill, Ending Balance $ 174,090,000
Percentage of fair value in excess of carrying amount for reporting unit 24.70%
Terrestrial and Wireless Networks | UHP  
Goodwill [Roll Forward]  
PST Divestiture $ 0
Impairment of long-lived assets, including goodwill $ 0