Cash, Cash Equivalents and Short-Term Investments - Schedule of Cash and Short Term Investments (Details) - USD ($) $ in Thousands	Jan. 31, 2024	Jan. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 748,141	$ 646,104
Gross Unrealized Gains	924	53
Gross Unrealized Losses	(776)	(4,908)
Fair Value	748,289	641,249
Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	287,999	295,402
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(3)	0
Fair Value	287,996	295,402
Cash | Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	80,953	232,332
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	80,953	232,332
Money market funds | Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	187,175	60,073
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	187,175	60,073
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	437,369	383,238
Gross Unrealized Gains	141	0
Gross Unrealized Losses	(389)	(3,729)
Fair Value	437,121	379,509
U.S. Treasury securities | Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	15,909
Gross Unrealized Gains	0
Gross Unrealized Losses	(2)
Fair Value	15,907
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	23,229	88,703
Gross Unrealized Gains	14	18
Gross Unrealized Losses	(1)	(112)
Fair Value	23,242	88,609
Commercial paper | Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,962
Gross Unrealized Gains	0
Gross Unrealized Losses	(1)
Fair Value	3,961
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	231,219	95,805
Gross Unrealized Gains	740	33
Gross Unrealized Losses	(250)	(572)
Fair Value	231,709	95,266
U.S. Agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	56,324	74,158
Gross Unrealized Gains	29	2
Gross Unrealized Losses	(136)	(435)
Fair Value	$ 56,217	73,725
U.S. Agency securities | Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		2,997
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Fair Value		2,997
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		1,989
Gross Unrealized Gains		0
Gross Unrealized Losses		(19)
Fair Value		1,970
Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		2,211
Gross Unrealized Gains		0
Gross Unrealized Losses		(41)
Fair Value		$ 2,170