Balance Sheet Components - Schedule of Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Balance Sheet Components Disclosure [Abstract]
Taxes payable	$ 4,052	$ 1,675
Accrued marketing	5,928	6,718
Accrued travel and entertainment expenses	4,386	2,235
Other accrued liabilities	12,463	11,069
Total accrued expenses and other liabilities	$ 26,829	$ 21,697