Balance Sheet Components - Schedule of Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Balance Sheet Components Disclosure [Abstract]
Taxes payable	$ 3,801	$ 4,052
Accrued marketing	5,017	5,928
Accrued travel and entertainment expenses	2,556	4,386
Other accrued liabilities	15,675	12,463
Total accrued expenses and other liabilities	$ 27,049	$ 26,829