Balance Sheet Components - Accrued Expenses (Details) - USD ($) $ in Thousands	Jul. 31, 2019	Jan. 31, 2019
Accrued Expenses
Web hosting services	$ 7,478	$ 12,224
Accrued purchases of property and equipment	10,701	7,042
Other vendor expenses	12,707	12,326
Amounts due for employee expenses	1,682	949
Accrued expenses	32,568	32,541
Accrued Payroll and Benefits
Accrued payroll and related expenses	5,686	4,326
Accrued bonuses	5,433	5,459
Accrued commissions	8,938	9,499
Accrued payroll and benefits	$ 20,057	$ 19,284