Income Taxes - Schedule of Income Tax Provision (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Current:
U.S. federal tax	$ 2,022	$ 962	$ 306
U.S. state taxes	5	26
Non-U.S. foreign taxes	701	502	708
Current income tax provision	2,728	1,490	1,014
Deferred:
U.S. federal tax	(743)	(73)	473
U.S. state taxes	(109)	(36)	10
Non-U.S. foreign taxes	(22)	(37)	4
Deferred income tax provision	(874)	(146)	487
Provision for income taxes	$ 1,854	$ 1,344	$ 1,501