Balance Sheet Components - Schedule of Accrued and Other Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Balance Sheet Components Disclosure [Abstract]
Accrued vacation	$ 3,511	$ 3,561
Accrued interest	3,141	61
Accrued sales commissions	2,567	4,706
Accrued sales and use taxes payable	2,060	1,697
Accrued bonus	1,417	2,427
Other accruals	10,605	8,216
Total accrued and other current liabilities	$ 23,301	$ 20,668