Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2026	Apr. 30, 2025
Disaggregation of Revenue [Line Items]
Net sales	$ 106,004,000	$ 126,787,000	$ 323,797,000	$ 369,161,000
Point in time
Disaggregation of Revenue [Line Items]
Net sales	24,231,000	37,882,000	102,203,000	104,245,000
Over time
Disaggregation of Revenue [Line Items]
Net sales	81,773,000	88,905,000	221,594,000	264,916,000
Firm fixed-price
Disaggregation of Revenue [Line Items]
Net sales	103,747,000	113,312,000	316,018,000	323,917,000
Cost reimbursable
Disaggregation of Revenue [Line Items]
Net sales	2,257,000	13,475,000	7,779,000	45,244,000
U.S. government
Disaggregation of Revenue [Line Items]
Net sales	23,346,000	32,419,000	57,688,000	118,234,000
Domestic
Disaggregation of Revenue [Line Items]
Net sales	57,864,000	64,715,000	177,455,000	178,312,000
Total United States
Disaggregation of Revenue [Line Items]
Net sales	81,210,000	97,134,000	235,143,000	296,546,000
International
Disaggregation of Revenue [Line Items]
Net sales	24,794,000	29,653,000	88,654,000	72,615,000
Satellite and Space Communications
Disaggregation of Revenue [Line Items]
Net sales	50,331,000	67,566,000	156,041,000	200,220,000
Satellite and Space Communications \| Point in time
Disaggregation of Revenue [Line Items]
Net sales	23,824,000	37,682,000	101,467,000	102,708,000
Satellite and Space Communications \| Over time
Disaggregation of Revenue [Line Items]
Net sales	26,507,000	29,884,000	54,574,000	97,512,000
Satellite and Space Communications \| Firm fixed-price
Disaggregation of Revenue [Line Items]
Net sales	48,074,000	54,091,000	148,262,000	154,976,000
Satellite and Space Communications \| Cost reimbursable
Disaggregation of Revenue [Line Items]
Net sales	2,257,000	13,475,000	7,779,000	45,244,000
Satellite and Space Communications \| U.S. government
Disaggregation of Revenue [Line Items]
Net sales	22,855,000	31,790,000	55,637,000	116,409,000
Satellite and Space Communications \| Domestic
Disaggregation of Revenue [Line Items]
Net sales	7,508,000	10,085,000	26,606,000	23,919,000
Satellite and Space Communications \| Total United States
Disaggregation of Revenue [Line Items]
Net sales	30,363,000	41,875,000	82,243,000	140,328,000
Satellite and Space Communications \| International
Disaggregation of Revenue [Line Items]
Net sales	19,968,000	25,691,000	73,798,000	59,892,000
Allerium
Disaggregation of Revenue [Line Items]
Net sales	55,673,000	59,221,000	167,756,000	168,941,000
Allerium \| Point in time
Disaggregation of Revenue [Line Items]
Net sales	407,000	200,000	736,000	1,537,000
Allerium \| Over time
Disaggregation of Revenue [Line Items]
Net sales	55,266,000	59,021,000	167,020,000	167,404,000
Allerium \| Firm fixed-price
Disaggregation of Revenue [Line Items]
Net sales	55,673,000	59,221,000	167,756,000	168,941,000
Allerium \| Cost reimbursable
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Allerium \| U.S. government
Disaggregation of Revenue [Line Items]
Net sales	491,000	629,000	2,051,000	1,825,000
Allerium \| Domestic
Disaggregation of Revenue [Line Items]
Net sales	50,356,000	54,630,000	150,849,000	154,393,000
Allerium \| Total United States
Disaggregation of Revenue [Line Items]
Net sales	50,847,000	55,259,000	152,900,000	156,218,000
Allerium \| International
Disaggregation of Revenue [Line Items]
Net sales	$ 4,826,000	$ 3,962,000	$ 14,856,000	$ 12,723,000

COMTECH TELECOMMUNICATIONS CORP /DE/ 10-Q