Summary of Significant Accounting Policies - Changes in Product Warranty Accrual (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Accounting Policies [Abstract]
Product warranty term	12 months
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning Balance	$ 2,522	$ 1,360	$ 894
Warranty assumed from Micronetics acquisition	0	245	0
Accruals for warranties issued during the period	1,951	4,592	2,445
Settlements made during the period	(2,395)	(3,675)	(1,979)
Ending Balance	$ 2,078	$ 2,522	$ 1,360