Summary of Significant Accounting and Reporting Policies (Revenue Recognition, Narrative) (Details) - USD ($)	12 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2023
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 499,528,000	$ 540,403,000	$ 549,994,000
Contract liabilities	62,546,000	65,834,000	66,351,000
Revenue recognized, included in contract liabilities in prior period	54,686,000	48,902,000
Capitalized contract cost, gross	2,887,000	2,863,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-08-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Remaining performance obligations, amount	$ 672,053,000
Remaining performance obligations, period	24 months
International
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 105,095,000	$ 115,924,000	$ 132,117,000
Customer Concentration Risk | Net sales | Verizon Communications Inc.
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage			10.60%
Geographic Concentration Risk | Net sales
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%
Geographic Concentration Risk | Net sales | International
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage	21.00%	21.50%	24.00%
Net sales	$ 105,095,000	$ 115,924,000	$ 132,117,000