Net Sales by Geographic Region (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 13,686	$ 16,161	$ 30,146	$ 34,502
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	8,173	8,869	17,804	19,059
Markets outside the United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 5,513	$ 7,292	$ 12,342	$ 15,443