Property and Equipment, Net - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 32,490	$ 18,778
Less: Accumulated depreciation and amortization	(8,804)	(5,405)
Property and equipment, net	23,686	13,373
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	1,349	837
Computers, software, and electronic equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	5,623	3,489
Capitalized internal-use software
Property, Plant and Equipment [Line Items]
Total property and equipment	16,312	6,959
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	7,568	4,568
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 1,638	$ 2,925