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Summary of Significant Accounting Policies - Changes in Product Warranty Accrual (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Accounting Policies [Abstract]      
Product warranty term 12 months    
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]      
Beginning Balance $ 2,078 $ 2,522 $ 1,360
Warranty assumed from Micronetics acquisition 0   245
Accruals for warranties issued during the period 1,465 1,951 4,592
Settlements made during the period (1,569) (2,395) (3,675)
Ending Balance $ 1,974 $ 2,078 $ 2,522