Radyne Acquisition-Related Restructuring Plan - Activity of Facility Related Exit Costs (Details) - USD ($)	12 Months Ended			120 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2018	Aug. 01, 2008
Restructuring Reserve [Roll Forward]
Present value of estimated facility-related exit costs, beginning balance		$ 1,941,000			$ 2,100,000
Cash payments made	$ (1,623,000)			$ (12,211,000)
Cash payments received				8,600,000
Accreted interest recorded	88,000	$ 189,000	$ 278,000	1,917,000
Liability recorded as of period end as accrued expenses and other current liabilities in the Consolidated Balance Sheet	$ 406,000			$ 406,000