Net Sales by Geographic Region (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 15,835	$ 17,422	$ 45,981	$ 51,924
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	9,485	10,876	27,288	29,935
Markets outside the United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 6,350	$ 6,546	$ 18,693	$ 21,989