Accounts Receivable - Narrative (Details) - USD ($)	12 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Oct. 31, 2024
Statement [Line Items]
Unbilled Receivables, Not Billable	$ 17,685,000
Cumulative Earnings (Deficit)	$ (1,551,000)
Accounts receivable, after allowance for credit loss, term	1 year
Total accounts receivable	$ 163,993,000	$ 197,527,000
U.S. Marine Corps
Statement [Line Items]
Loss contingency, damages sought, value	$ 15,701,000
Accounts Receivable | Customer Concentration Risk | U.S. government
Statement [Line Items]
Concentration risk, percentage		36.70%
Accounts Receivable | Customer Concentration Risk | U.K.
Statement [Line Items]
Concentration risk, percentage		11.40%
Accounts Receivable | Customer Concentration Risk | AT&T, Inc.
Statement [Line Items]
Concentration risk, percentage		11.00%
U.S. Government and Its Agencies | Accounts Receivable | Customer Concentration Risk
Statement [Line Items]
Concentration risk, percentage	25.10%
AT&T, Inc. | Accounts Receivable | Customer Concentration Risk
Statement [Line Items]
Concentration risk, percentage	14.50%
Unbilled Receivables
Statement [Line Items]
Accounts receivable, after allowance for credit loss, noncurrent		$ 824,000
Unbilled Receivables | U.S. Government and Its Agencies
Statement [Line Items]
Total accounts receivable	$ 20,683,000	51,197,000
Billed Receivables | U.S. Government and Its Agencies
Statement [Line Items]
Total accounts receivable	15,610,000	$ 20,682,000
CGC Divestiture
Statement [Line Items]
Unbilled Receivables, Not Billable			$ 3,003,000
Cumulative Earnings (Deficit)			4,157,000
Satellite And Space Communications
Statement [Line Items]
Unbilled Receivables, Not Billable			2,324,000
Cumulative Earnings (Deficit)			$ 3,030,000
Modular Transportable Transmission Systems
Statement [Line Items]
Unbilled Receivables, Not Billable	2,234,000
Cumulative Earnings (Deficit)	2,286,000
Accounts Receivable
Statement [Line Items]
Unbilled Receivables, Not Billable	$ 16,134,000