Cash Equivalents and Short-Term Investments - Summary of Cash Equivalents and Short-term Investments (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021
Cash and Cash Equivalents
Cash Equivalents	$ 86,505	$ 31,438
Estimated Fair Value	86,505	31,438
Cash Equivalents and Short-Term Investments, Amortized Cost	196,967	50,983
Cash Cash Equivalents And Short Term Investments Estimated Fair Value	196,771	50,984
Short-Term Investments, Amortized Cost	110,462	19,545
Short-Term Investments, Gross Unrealized Gains	0	2
Short-Term Investments, Gross Unrealized Losses	(196)	(1)
Short-Term Investments, Estimated Fair Value	110,266	19,546
Commercial paper
Cash and Cash Equivalents
Short-Term Investments, Amortized Cost	40,966	12,290
Short-Term Investments, Gross Unrealized Gains	0	0
Short-Term Investments, Gross Unrealized Losses	(1)	0
Short-Term Investments, Estimated Fair Value	40,965	12,290
U.S. government treasury securities
Cash and Cash Equivalents
Short-Term Investments, Amortized Cost	39,340
Short-Term Investments, Gross Unrealized Gains	0
Short-Term Investments, Gross Unrealized Losses	(129)
Short-Term Investments, Estimated Fair Value	39,211
Corporate debt securities
Cash and Cash Equivalents
Short-Term Investments, Amortized Cost	30,156	7,255
Short-Term Investments, Gross Unrealized Gains	0	2
Short-Term Investments, Gross Unrealized Losses	(66)	(1)
Short-Term Investments, Estimated Fair Value	30,090	7,256
Money market funds
Cash and Cash Equivalents
Cash Equivalents	86,505	31,438
Estimated Fair Value	$ 86,505	$ 31,438