Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Payables And Accruals [Abstract]
Accrued compensation	$ 6,750	$ 6,605
Accrued other current liabilities	10,740	7,841
Total accrued expenses and other current liabilities	$ 17,490	$ 14,446