Revenue from Contracts with Customers - Summary of Disaggregated Revenue by Revenue Market and Product (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Disaggregation Of Revenue [Line Items]
Revenue	$ 340,409	$ 314,433
Compound Semiconductors
Disaggregation Of Revenue [Line Items]
Revenue	177,001	179,277
Photonic Solutions
Disaggregation Of Revenue [Line Items]
Revenue	141,357	135,156
Unallocated & Other
Disaggregation Of Revenue [Line Items]
Revenue	22,051
Commercial | Direct Ship Parts
Disaggregation Of Revenue [Line Items]
Revenue	292,584	278,232
Commercial | Services
Disaggregation Of Revenue [Line Items]
Revenue	6,703
Commercial | Services
Disaggregation Of Revenue [Line Items]
Revenue		5,786
Commercial | Compound Semiconductors | Direct Ship Parts
Disaggregation Of Revenue [Line Items]
Revenue	130,188	144,867
Commercial | Compound Semiconductors | Services
Disaggregation Of Revenue [Line Items]
Revenue	5,691
Commercial | Compound Semiconductors | Services
Disaggregation Of Revenue [Line Items]
Revenue		3,995
Commercial | Photonic Solutions | Direct Ship Parts
Disaggregation Of Revenue [Line Items]
Revenue	140,345	133,365
Commercial | Photonic Solutions | Services
Disaggregation Of Revenue [Line Items]
Revenue	1,012
Commercial | Photonic Solutions | Services
Disaggregation Of Revenue [Line Items]
Revenue		1,791
Commercial | Unallocated & Other | Direct Ship Parts
Disaggregation Of Revenue [Line Items]
Revenue	22,051
U.S. Government | Direct Ship Parts
Disaggregation Of Revenue [Line Items]
Revenue	37,082	27,180
U.S. Government | Services
Disaggregation Of Revenue [Line Items]
Revenue	4,040	3,235
U.S. Government | Compound Semiconductors | Direct Ship Parts
Disaggregation Of Revenue [Line Items]
Revenue	37,082	27,180
U.S. Government | Compound Semiconductors | Services
Disaggregation Of Revenue [Line Items]
Revenue	$ 4,040	$ 3,235