Changes in Product Warranty Accrual (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Product Warranty Liability [Line Items]
Beginning balance	$ 894	$ 1,186	$ 1,750
Accruals for warranties issued during the period	2,445	970	997
Settlements made during the period	(1,979)	(1,262)	(1,561)
Ending balance	$ 1,360	$ 894	$ 1,186