Radyne Acquisition-Related Restructuring Plan - Activity of Facility Related Exit Costs (Details) - USD ($)	3 Months Ended		99 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2016
Restructuring Reserve [Roll Forward]
Present value of estimated facility-related exit costs, beginning balance	$ 3,327,000		$ 2,100,000
Cash payments made	(386,000)		(9,399,000)
Cash payments received			8,600,000
Accreted interest recorded	56,000	$ 74,000	1,696,000
Present value of estimated facility-related exit costs, ending balance	2,997,000		2,997,000
Amount recorded as accrued expenses and other current liabilities in the Condensed Consolidated Balance Sheet	1,422,000		1,422,000
Amount recorded as other liabilities in the Condensed Consolidated Balance Sheet	1,575,000		1,575,000
Cash payments made	$ 386,000		$ 9,399,000