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Property and Equipment, net (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2020
Property, Plant and Equipment [Line Items]      
Total property and equipment, gross $ 110,893 $ 100,941  
Less: accumulated depreciation (36,289) (20,597)  
Total property and equipment, net 74,604 80,344  
Depreciation $ 16,200 $ 10,000 $ 7,500
UNITED STATES | Property, Plant and Equipment | Geographic Concentration Risk      
Property, Plant and Equipment [Line Items]      
Concentration risk, percentage 90.00% 88.00%  
Computer software      
Property, Plant and Equipment [Line Items]      
Total property and equipment, gross $ 18,814 $ 10,719  
Office equipment      
Property, Plant and Equipment [Line Items]      
Total property and equipment, gross 18,854 14,856  
Furniture and fixtures      
Property, Plant and Equipment [Line Items]      
Total property and equipment, gross 8,163 7,344  
Leasehold improvements      
Property, Plant and Equipment [Line Items]      
Total property and equipment, gross 62,784 57,799  
Construction in progress      
Property, Plant and Equipment [Line Items]      
Total property and equipment, gross 936 4,469  
Software in progress      
Property, Plant and Equipment [Line Items]      
Total property and equipment, gross $ 1,342 $ 5,754