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Segment Information (Tables)
12 Months Ended
Jul. 31, 2024
Segment Reporting [Abstract]  
Segment reconciliation
Operating segment information, along with a reconciliation of segment net income (loss) and consolidated net income (loss) to Adjusted EBITDA is presented in the tables below:

 Fiscal Year Ended July 31, 2024
 Satellite and Space CommunicationsTerrestrial and Wireless NetworksUnallocatedTotal
Net sales$324,069,000 216,334,000 — $540,403,000 
Operating (loss) income$(54,202,000)21,670,000 (47,358,000)$(79,890,000)
Net (loss) income$(55,491,000)20,955,000 (65,449,000)$(99,985,000)
Provision for (benefit from) income taxes666,000 669,000 (1,630,000)(295,000)
Interest expense25,000 — 22,128,000 22,153,000 
Interest (income) and other598,000 46,000 34,000 678,000 
Write-off of deferred financing costs— — 1,832,000 1,832,000 
Change in fair value of warrants and
  derivatives
— — (4,273,000)(4,273,000)
Amortization of stock-based compensation— — 6,096,000 6,096,000 
Amortization of intangibles6,685,000 14,469,000 — 21,154,000 
Depreciation3,867,000 7,927,000 365,000 12,159,000 
Impairment of long-lived assets, including
  goodwill
64,525,000 — — 64,525,000 
Amortization of cost to fulfill assets960,000 — — 960,000 
CEO transition costs— — 2,916,000 2,916,000 
Restructuring costs3,822,000 605,000 8,043,000 12,470,000 
Strategic emerging technology costs4,110,000 — — 4,110,000 
Loss on business divestiture— — 1,199,000 1,199,000 
Adjusted EBITDA$29,767,000 44,671,000 (28,739,000)$45,699,000 
Purchases of property, plant and equipment$2,890,000 8,569,000 1,624,000 $13,083,000 
Total assets at July 31, 2024$421,780,000 456,425,000 34,229,000 $912,434,000 
 Fiscal Year Ended July 31, 2023
 Satellite and Space CommunicationsTerrestrial and Wireless NetworksUnallocatedTotal
Net sales$337,756,000 212,238,000 — $549,994,000 
Operating income (loss)$15,041,000 12,323,000 (42,024,000)$(14,660,000)
Net income (loss)$15,539,000 12,297,000 (54,735,000)$(26,899,000)
Benefit from income taxes(1,724,000)(193,000)(2,031,000)(3,948,000)
Interest expense2,000 — 14,959,000 14,961,000 
Interest (income) and other1,224,000 219,000 (217,000)1,226,000 
Amortization of stock-based compensation— — 10,107,000 10,107,000 
Amortization of intangibles7,312,000 14,084,000 — 21,396,000 
Depreciation4,121,000 7,637,000 164,000 11,922,000 
Amortization of cost to fulfill assets959,000 — — 959,000 
Restructuring costs5,725,000 1,220,000 3,907,000 10,852,000 
Strategic emerging technology costs3,833,000 — — 3,833,000 
CEO transition costs— — 9,090,000 9,090,000 
Adjusted EBITDA$36,991,000 35,264,000 (18,756,000)$53,499,000 
Purchases of property, plant and equipment$7,244,000 10,075,000 992,000 $18,311,000 
Total assets at July 31, 2023$515,449,000 460,034,000 20,754,000 $996,237,000 

 Fiscal Year Ended July 31, 2022
 Satellite and Space CommunicationsTerrestrial and Wireless NetworksUnallocatedTotal
Net sales$279,678,000 206,561,000 — $486,239,000 
Operating (loss) income$(5,671,000)18,925,000 (47,006,000)$(33,752,000)
Net (loss) income$(3,852,000)18,796,000 (47,996,000)$(33,052,000)
(Benefit from) provision for income taxes(1,120,000)19,000 (2,922,000)(4,023,000)
 Interest expense98,000 — 4,933,000 5,031,000 
 Interest (income) and other(797,000)110,000 (16,000)(703,000)
 Change in fair value of convertible
   preferred stock purchase option liability
— — (1,005,000)(1,005,000)
 Amortization of stock-based compensation— — 7,767,000 7,767,000 
 Amortization of intangibles7,312,000 14,084,000 — 21,396,000 
 Depreciation4,049,000 6,069,000 196,000 10,314,000 
Amortization of cost to fulfill assets469,000 — — 469,000 
 Restructuring costs5,666,000 — 299,000 5,965,000 
 COVID-19 related costs1,105,000 — — $1,105,000 
 Strategic emerging technology costs1,197,000 — — $1,197,000 
 CEO transition costs— — 13,554,000 13,554,000 
 Proxy solicitation costs— — 11,248,000 11,248,000 
Adjusted EBITDA$14,127,000 39,078,000 (13,942,000)$39,263,000 
Purchases of property, plant and equipment$8,915,000 10,704,000 — $19,619,000 
Total assets at July 31, 2022$487,235,000 461,443,000 25,619,000 $974,297,000