Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Payables And Accruals [Abstract]
Accrued commissions	$ 2,798	$ 1,309
Accrued bonus	2,957	1,901
Deferred compensation associated with Zinc Ahead	1,120
Accrued other compensation and benefits	5,576	3,287
Total accrued compensation and benefits	12,451	6,497
Accrued fees paid to salesforce.com	4,222	3,395
Accrued third-party professional services subcontractors fees	1,152	1,631
Sales taxes payable	1,597	1,666
Other accrued expenses	4,088	2,247
Total accrued expenses and other current liabilities	$ 11,059	$ 8,939