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Property and Equipment, Net (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2022
Jul. 31, 2021
Jul. 31, 2022
Jul. 31, 2021
Jan. 31, 2022
Property, Plant and Equipment [Line Items]          
Total property and equipment, gross $ 113,518   $ 113,518   $ 110,893
Less: accumulated depreciation (44,328)   (44,328)   (36,289)
Total property and equipment, net 69,190   69,190   $ 74,604
Depreciation expense 4,300 $ 4,000 $ 8,700 $ 7,600  
Geographic Concentration Risk | UNITED STATES | Property, Plant and Equipment          
Property, Plant and Equipment [Line Items]          
Concentration risk, percentage     88.00%   90.00%
Computer software          
Property, Plant and Equipment [Line Items]          
Total property and equipment, gross 20,025   $ 20,025   $ 18,814
Office equipment          
Property, Plant and Equipment [Line Items]          
Total property and equipment, gross 20,222   20,222   18,854
Furniture and fixtures          
Property, Plant and Equipment [Line Items]          
Total property and equipment, gross 7,929   7,929   8,163
Leasehold improvements          
Property, Plant and Equipment [Line Items]          
Total property and equipment, gross 61,835   61,835   62,784
Construction in progress          
Property, Plant and Equipment [Line Items]          
Total property and equipment, gross 2,536   2,536   936
Software in progress          
Property, Plant and Equipment [Line Items]          
Total property and equipment, gross $ 971   $ 971   $ 1,342