Accrued Expenses - Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2013	Jan. 31, 2013
Payables And Accruals [Abstract]
Accrued payroll	$ 2,047	$ 1,457
Sales and withholding taxes	475	2,595
Accrued commissions and bonuses	1,094	1,543
Accrued income taxes payable	863	73
Deferred rent, current portion	598	523
Legal and professional	495	451
Other accrued expenses	490	642
Total accrued expenses	$ 6,062	$ 7,284