Property and Equipment, Net - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Property, Plant and Equipment
Total property and equipment	$ 80,922	$ 32,068
Less: accumulated depreciation and amortization	(11,954)	(4,932)
Total property and equipment, net	68,968	27,136
Computers, equipment, and software
Property, Plant and Equipment
Total property and equipment	3,817	1,998
Furniture and fixtures
Property, Plant and Equipment
Total property and equipment	6,627	1,043
Leasehold improvements
Property, Plant and Equipment
Total property and equipment	41,593	18,219
Capitalized internal-use software development costs
Property, Plant and Equipment
Total property and equipment	12,855	4,794
Less: accumulated depreciation and amortization	(5,500)	(2,600)
Construction in progress
Property, Plant and Equipment
Total property and equipment	$ 16,030	$ 6,014