Long-lived Assets, including Goodwill (Details)	3 Months Ended	12 Months Ended
	Oct. 31, 2024 USD ($) $ / shares	Jul. 31, 2025 USD ($) segment $ / shares	Jul. 31, 2024 USD ($) $ / shares
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 284,180,000	$ 284,180,000
Goodwill, Ending Balance		204,625,000
Goodwill, impaired accumulated impairment loss		128,480,000	$ 48,925,000
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
Number of reporting units | segment		2
UHP
Goodwill [Roll Forward]
Goodwill impairment		$ (79,555,000)
Goodwill, Impairment Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]		Impairment of long-lived assets, including goodwill
Common Stock
Goodwill [Roll Forward]
Share price (in dollars per share) | $ / shares	$ 3.72	$ 2.05	$ 3.17
Satellite and Space Communications
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 110,090,000	$ 110,090,000
Goodwill, Ending Balance		$ 30,535,000
Percentage of fair value in excess of carrying amount for reporting unit		19.90%
Satellite and Space Communications | UHP
Goodwill [Roll Forward]
Goodwill impairment		$ (79,555,000)
Allerium
Goodwill [Roll Forward]
Goodwill, Beginning Balance	174,090,000	174,090,000
Goodwill, Ending Balance		$ 174,090,000
Percentage of fair value in excess of carrying amount for reporting unit		7.30%	24.70%
Allerium | UHP
Goodwill [Roll Forward]
Goodwill impairment		$ 0
Satellite And Space Communications | UHP
Goodwill [Roll Forward]
Goodwill impairment	$ (79,555,000)