Accrued Expenses - Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2014	Jan. 31, 2013
Payables And Accruals [Abstract]
Accrued payroll	$ 1,603	$ 1,457
Sales and withholding taxes	3,158	2,595
Accrued commissions and bonuses	2,456	1,543
Accrued income taxes payable	571	73
Deferred rent, current portion	602	523
Legal and professional	489	451
Other accrued expenses	1,406	642
Total accrued expenses	$ 10,285	$ 7,284