Inventory (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Mar. 31, 2012
Schedule of Inventory [Line Items]
Finished goods	$ 13,095	$ 11,347
Less inventory allowances	(167)	(78)
Net inventory	$ 12,928	$ 11,269	[1]

[1] Reference is made to the Company's Annual Report on Form 10-K for the fiscal year ended March 31, 2012 filed with the Securities and Exchange Commission on July 13, 2012.