Operating Segment, Geographic Information and Significant Customers - Net Revenue by End Application (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Revenue from External Customer [Line Items]
Net revenues	$ 115,608	$ 107,317	$ 98,014	$ 87,649	$ 85,430	$ 65,898	$ 60,417	$ 58,409	$ 408,588	$ 270,154	$ 234,847
Radar End User Applications
Revenue from External Customer [Line Items]
Net revenues									150,441	140,289	143,475
Electronic Warfare End User Applications
Revenue from External Customer [Line Items]
Net revenues									106,446	72,118	51,419
Other End User Applications
Revenue from External Customer [Line Items]
Net revenues									$ 151,701	$ 57,747	$ 39,953