Employee Benefit Plans - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan, matching contribution	$ 468	$ 498	$ 0
Foreign Defined Contribution Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan, matching contribution	$ 976	$ 826	$ 680