CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (3,347)	$ (693)	$ 390	$ 5,614
Change in cumulative translation adjustment	277	(4,610)	1,547	(6,191)
Comprehensive (loss) income	$ (3,070)	$ (5,303)	$ 1,937	$ (577)