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	Jul. 31, 2022	Jan. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Amortized Cost	$ 190,964	$ 202,446
Cash equivalents, Estimated Fair Value	190,964	202,446
Short-term investments, Amortized Cost	44,827
Short-term investments, Unrealized Loss	(82)
Short-term investments, Estimated Fair Value	44,745
Total cash equivalents and short term investments, Amortized Cost	235,791
Total cash equivalents and short term investments, Unrealized Loss	(82)
Total cash equivalents and short term investments, Estimated Fair Value	235,709
U.S. Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Amortized Cost	4,994
Cash equivalents, Estimated Fair Value	4,994
Short-term investments, Amortized Cost	42,829
Short-term investments, Unrealized Loss	(82)
Short-term investments, Estimated Fair Value	42,747
Commercial Paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, Amortized Cost	1,998
Short-term investments, Estimated Fair Value	1,998
Money Market Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Amortized Cost	185,970	202,446
Cash equivalents, Estimated Fair Value	$ 185,970	$ 202,446