Fair Value of Financial Instruments - Summary of Amortized Cost, Unrealized Gain (Loss) and Estimated Fair Value of Cash Equivalents and Short-term Investments (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Jan. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Amortized Cost	$ 178,261	$ 202,446
Cash equivalents, Estimated Fair Value	178,261	202,446
Short-term investments, Amortized Cost	37,913
Short-term investments, Unrealized Loss	(24)
Short-term investments, Estimated Fair Value	37,889
Total cash equivalents and short term investments, Amortized Cost	216,174
Total cash equivalents and short term investments, Unrealized Loss	(24)
Total cash equivalents and short term investments, Estimated Fair Value	216,150
U.S. Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Amortized Cost	9,999
Cash equivalents, Estimated Fair Value	9,999
Short-term investments, Amortized Cost	35,921
Short-term investments, Unrealized Loss	(24)
Short-term investments, Estimated Fair Value	35,897
Commercial Paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Amortized Cost	1,999
Cash equivalents, Estimated Fair Value	1,999
Short-term investments, Amortized Cost	1,992
Short-term investments, Estimated Fair Value	1,992
Money Market Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Amortized Cost	166,263	202,446
Cash equivalents, Estimated Fair Value	$ 166,263	$ 202,446