Income Before Provision for Income Taxes and Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Income Taxes [Line Items]
Income (loss) before income tax provision	$ 3,762	$ 4,651	$ 1,429	$ (1,312)	$ 4,140	$ 3,243	$ 5,924	$ 3,555	$ 8,530	$ 16,862	$ 2,543
Current income tax provision, Federal									(100)	97
Current income tax provision, State									(106)
Current income tax provision, Foreign									525	996	259
Current income tax provision									319	1,093	259
Deferred income tax provision, Federal									825	825	825
Deferred income tax provision, State									35	(70)	(36)
Deferred income tax provision, Foreign
Deferred income tax provision									860	755	789
Total income tax provision	140	258	370	411	398	559	455	436	1,179	1,848	1,048
United States
Income Taxes [Line Items]
Income (loss) before income tax provision									4,267	10,202	236
Foreign
Income Taxes [Line Items]
Income (loss) before income tax provision									$ 4,263	$ 6,660	$ 2,307