Segment Information (Details)	3 Months Ended		12 Months Ended
	Oct. 31, 2023 USD ($) ft² productArea	Oct. 31, 2022 USD ($)	Jul. 31, 2023 USD ($)	Jul. 31, 2022 USD ($)	Jul. 31, 2021 USD ($)
Segment Reporting Information, Profit (Loss)
Net sales	$ 151,911,000	$ 131,139,000
Operating income (loss)	2,086,000	(9,724,000)	$ (14,660,000)	$ (33,752,000)	$ (68,298,000)
Net income (loss)	(1,437,000)	(11,096,000)
(Benefit from) provision for income taxes	(1,344,000)	(608,000)
Interest expense	4,932,000	2,235,000
Interest (income) and other	(65,000)	(255,000)
Amortization of stock-based compensation	2,645,000	904,000
Amortization of intangibles	5,289,000	5,349,000
Depreciation	3,022,000	2,798,000
Amortization of cost to fulfill assets	240,000	240,000
CEO transition costs	0	9,090,000
Restructuring costs	3,716,000	1,325,000
Strategic emerging technology costs	1,370,000	746,000
Adjusted EBITDA	18,368,000	10,728,000
Purchases of property, plant and equipment	3,216,000	7,221,000
Total assets	$ 1,012,543,000	977,825,000	$ 996,237,000
Chandler, Arizona
Segment Reporting Information [Line Items]
Area of property (in sq ft) | ft²	146,000
Satellite and Space Communications
Segment Reporting Information [Line Items]
Number of product areas | productArea	4
Segment Reporting Information, Profit (Loss)
Net sales	$ 102,388,000	80,873,000
Terrestrial and Wireless Networks
Segment Reporting Information [Line Items]
Number of product areas | productArea	3
Segment Reporting Information, Profit (Loss)
Net sales	$ 49,523,000	50,266,000
Operating Segments | Satellite and Space Communications
Segment Reporting Information, Profit (Loss)
Net sales	102,388,000	80,873,000
Operating income (loss)	10,105,000	5,016,000
Net income (loss)	9,303,000	5,815,000
(Benefit from) provision for income taxes	227,000	(222,000)
Interest expense	872,000	(2,000)
Interest (income) and other	(297,000)	(575,000)
Amortization of stock-based compensation	0	0
Amortization of intangibles	1,672,000	1,828,000
Depreciation	954,000	1,020,000
Amortization of cost to fulfill assets	240,000	240,000
CEO transition costs		0
Restructuring costs	790,000	1,056,000
Strategic emerging technology costs	1,370,000	746,000
Adjusted EBITDA	15,131,000	9,906,000
Purchases of property, plant and equipment	903,000	4,435,000
Total assets	527,343,000	486,636,000
Operating Segments | Terrestrial and Wireless Networks
Segment Reporting Information, Profit (Loss)
Net sales	49,523,000	50,266,000
Operating income (loss)	4,040,000	744,000
Net income (loss)	4,145,000	605,000
(Benefit from) provision for income taxes	(300,000)	(165,000)
Interest expense	0	0
Interest (income) and other	195,000	304,000
Amortization of stock-based compensation	0	0
Amortization of intangibles	3,617,000	3,521,000
Depreciation	1,973,000	1,737,000
Amortization of cost to fulfill assets	0	0
CEO transition costs		0
Restructuring costs	7,000	0
Strategic emerging technology costs	0	0
Adjusted EBITDA	9,637,000	6,002,000
Purchases of property, plant and equipment	1,736,000	2,542,000
Total assets	460,088,000	467,594,000
Unallocated
Segment Reporting Information, Profit (Loss)
Net sales	0	0
Operating income (loss)	(12,059,000)	(15,484,000)
Net income (loss)	(14,885,000)	(17,516,000)
(Benefit from) provision for income taxes	(1,271,000)	(221,000)
Interest expense	4,060,000	2,237,000
Interest (income) and other	37,000	16,000
Amortization of stock-based compensation	2,645,000	904,000
Amortization of intangibles	0	0
Depreciation	95,000	41,000
Amortization of cost to fulfill assets	0	0
CEO transition costs		9,090,000
Restructuring costs	2,919,000	269,000
Strategic emerging technology costs	0	0
Adjusted EBITDA	(6,400,000)	(5,180,000)
Purchases of property, plant and equipment	577,000	244,000
Total assets	$ 25,112,000	$ 23,595,000