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Purchase Price at the Date of Acquisition (Detail) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Nov. 30, 2017
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Business Acquisition [Line Items]          
Net cash paid at acquisition     $ 80,503 $ 40,015 $ 122,157
Working capital adjustment $ 200        
Integrated Photonics, Inc          
Business Acquisition [Line Items]          
Net cash paid at acquisition   $ 40,098      
Working capital adjustment   848      
Fair value of cash earnout arrangement   2,215      
Purchase price   $ 43,161