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Cash Equivalents and Short-Term Investments - Summary of Cash Equivalents and Short-term Investments (Details) - USD ($) $ in Thousands	Jul. 31, 2022	Jan. 31, 2022
Schedule Of Cash Cash Equivalents And Short Term Investments
Cash equivalents, amortized cost	$ 42,090	$ 86,505
Cash equivalents, estimate fair value	42,090	86,505
Short-Term Investments
Amortized Cost	146,810	110,462
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,043)	(196)
Estimated Fair Value	145,767	110,266
Amortized Cost	188,900	196,967
Estimated Fair Value	187,857	196,771
U.S. government securities
Short-Term Investments
Amortized Cost	92,755
Gross Unrealized Gains	0
Gross Unrealized Losses	(929)
Estimated Fair Value	91,826
U.S. government treasury securities
Short-Term Investments
Amortized Cost		39,340
Gross Unrealized Gains		0
Gross Unrealized Losses		(129)
Estimated Fair Value		39,211
Corporate debt securities
Short-Term Investments
Amortized Cost	27,460	30,156
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(106)	(66)
Estimated Fair Value	27,354	30,090
Commercial paper
Short-Term Investments
Amortized Cost	23,647	40,966
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	(1)
Estimated Fair Value	23,647	40,965
Asset-backed securities
Short-Term Investments
Amortized Cost	2,948
Gross Unrealized Gains	0
Gross Unrealized Losses	(8)
Estimated Fair Value	2,940
Money market funds
Schedule Of Cash Cash Equivalents And Short Term Investments
Cash equivalents, amortized cost	42,090	86,505
Cash equivalents, estimate fair value	$ 42,090	$ 86,505

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