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Warranty - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
Warranty - Additional Information (Detail) (USD $)	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Product Warranties Disclosures [Abstract]
Warranty reserves related to continuing operations	$ 399,000	$ 599,000	$ 399,000	$ 599,000	$ 361,000	$ 526,000	$ 695,000	$ 688,000
Warranty expense related to continuing operations	$ 127,000	$ 26,000	$ 252,000	$ 444,000

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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