Summary of Significant Accounting and Reporting Policies (Disaggregation of Revenue) (Details) - USD ($)	12 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 549,994,000	$ 486,239,000	$ 581,695,000
Point in time
Disaggregation of Revenue [Line Items]
Net sales	200,776,000	188,685,000	236,394,000
Over time
Disaggregation of Revenue [Line Items]
Net sales	349,218,000	297,554,000	345,301,000
Firm fixed-price
Disaggregation of Revenue [Line Items]
Net sales	500,720,000	456,058,000	498,888,000
Cost reimbursable
Disaggregation of Revenue [Line Items]
Net sales	49,274,000	30,181,000	82,807,000
U.S. government
Disaggregation of Revenue [Line Items]
Net sales	171,978,000	132,597,000	201,081,000
Domestic
Disaggregation of Revenue [Line Items]
Net sales	245,899,000	232,250,000	241,671,000
Total United States
Disaggregation of Revenue [Line Items]
Net sales	417,877,000	364,847,000	442,752,000
International
Disaggregation of Revenue [Line Items]
Net sales	132,117,000	121,392,000	138,943,000
Satellite and Space Communications
Disaggregation of Revenue [Line Items]
Net sales	337,756,000	279,678,000	374,850,000
Satellite and Space Communications | Point in time
Disaggregation of Revenue [Line Items]
Net sales	197,808,000	186,052,000	234,690,000
Satellite and Space Communications | Over time
Disaggregation of Revenue [Line Items]
Net sales	139,948,000	93,626,000	140,160,000
Satellite and Space Communications | Firm fixed-price
Disaggregation of Revenue [Line Items]
Net sales	288,482,000	249,497,000	292,043,000
Satellite and Space Communications | Cost reimbursable
Disaggregation of Revenue [Line Items]
Net sales	49,274,000	30,181,000	82,807,000
Satellite and Space Communications | U.S. government
Disaggregation of Revenue [Line Items]
Net sales	168,411,000	127,536,000	198,157,000
Satellite and Space Communications | Domestic
Disaggregation of Revenue [Line Items]
Net sales	56,568,000	50,274,000	57,246,000
Satellite and Space Communications | Total United States
Disaggregation of Revenue [Line Items]
Net sales	224,979,000	177,810,000	255,403,000
Satellite and Space Communications | International
Disaggregation of Revenue [Line Items]
Net sales	112,777,000	101,868,000	119,447,000
Terrestrial and Wireless Networks
Disaggregation of Revenue [Line Items]
Net sales	212,238,000	206,561,000	206,845,000
Terrestrial and Wireless Networks | Point in time
Disaggregation of Revenue [Line Items]
Net sales	2,968,000	2,633,000	1,704,000
Terrestrial and Wireless Networks | Over time
Disaggregation of Revenue [Line Items]
Net sales	209,270,000	203,928,000	205,141,000
Terrestrial and Wireless Networks | Firm fixed-price
Disaggregation of Revenue [Line Items]
Net sales	212,238,000	206,561,000	206,845,000
Terrestrial and Wireless Networks | Cost reimbursable
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Terrestrial and Wireless Networks | U.S. government
Disaggregation of Revenue [Line Items]
Net sales	3,567,000	5,061,000	2,924,000
Terrestrial and Wireless Networks | Domestic
Disaggregation of Revenue [Line Items]
Net sales	189,331,000	181,976,000	184,425,000
Terrestrial and Wireless Networks | Total United States
Disaggregation of Revenue [Line Items]
Net sales	192,898,000	187,037,000	187,349,000
Terrestrial and Wireless Networks | International
Disaggregation of Revenue [Line Items]
Net sales	$ 19,340,000	$ 19,524,000	$ 19,496,000