Summary of Significant Accounting Policies - Changes in Product Warranty Accrual (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Changes in Product Warranty Accrual [Line Items]
Product warranty term	12 months
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning Balance	$ 1,360	$ 894	$ 1,186
Warranty assumed from Micronetics acquisition	245	0	0
Accruals for warranties issued during the period	4,592	2,445	970
Settlements made during the period	(3,675)	(1,979)	(1,262)
Ending Balance	$ 2,522	$ 1,360	$ 894