Summary of Business and Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Jan. 31, 2022 USD ($) vote reporting_unit	Jan. 31, 2021 USD ($)	Jan. 31, 2020 USD ($)
Summary Of Business And Significant Accounting Policies [Line Items]
Restricted cash from international employee stock sales	$ 10,236,000	$ 50,475,000
Capitalized software development costs	20,200,000	19,400,000	$ 3,100,000
Impairment of long-lived assets	$ 0	0	0
Number of Reporting Units | reporting_unit	1
Advertising expense	$ 40,900,000	$ 34,800,000	$ 42,000,000
Number of operating segments | vote	1
Revenue from Contract with Customer | Professional Services Fees Concentration Risk | Service
Summary Of Business And Significant Accounting Policies [Line Items]
Percentage of revenue	2.00%
Minimum
Summary Of Business And Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	3 years
Maximum
Summary Of Business And Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	5 years
Leasehold Improvements | Maximum
Summary Of Business And Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	5 years
Software
Summary Of Business And Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	3 years