Balance Sheet Components - Schedule of Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Balance Sheet Components Disclosure [Abstract]
Taxes payable	$ 3,790	$ 4,052
Accrued marketing	4,703	5,928
Accrued travel and entertainment expenses	4,119	4,386
Other accrued liabilities	13,017	12,463
Total accrued expenses and other liabilities	$ 25,629	$ 26,829