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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 |  |

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