Property and Equipment, Net - Schedule (Details) - USD ($) $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 63,869	$ 77,105
Less: accumulated depreciation and amortization	(5,553)	(3,441)
Property and equipment, net	58,316	73,664
Servers
Property, Plant and Equipment [Line Items]
Total property and equipment	946	587
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	2,673	2,224
Computer and office equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	229	174
Purchased software
Property, Plant and Equipment [Line Items]
Total property and equipment	985	985
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	19,311	16,958
Construction in process
Property, Plant and Equipment [Line Items]
Total property and equipment	314	16
Building
Property, Plant and Equipment [Line Items]
Total property and equipment	0	56,161
Finance lease right-of-use assets
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 39,411	$ 0