Income Taxes - Benefit (Provision) for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended									12 Months Ended
	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Current:
Federal										$ (944)	$ (663)	$ (727)
State										(28)	(9)	(72)
Foreign										(292)	(86)	(777)
Total current										(1,264)	(758)	(1,576)
Deferred:
Federal										1,908	812	(400)
State										64	236	137
Foreign										108	(247)	44
Change in valuation allowance									12,501	104	(155)	12,501
Total deferred										2,184	646	12,282
Total benefit (provision) for income taxes	$ 392	$ (128)	$ 402	$ 254	$ 437	$ (217)	$ (367)	$ 35		$ 920	$ (112)	$ 10,706