Operating Segment, Geographic Information and Significant Customers - Net Revenue by Product Grouping (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Revenue from External Customer [Line Items]
Net revenues	$ 152,867	$ 116,336	$ 117,912	$ 106,069	$ 115,608	$ 107,317	$ 98,014	$ 87,649	$ 493,184	$ 408,588	$ 270,154
Components
Revenue from External Customer [Line Items]
Net revenues									142,982	105,669	31,252
Modules and Sub-assemblies
Revenue from External Customer [Line Items]
Net revenues									194,377	161,973	126,777
Integrated Subsystems
Revenue from External Customer [Line Items]
Net revenues									$ 155,825	$ 140,946	$ 112,125