Financial Instruments - Schedule of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Jul. 31, 2024	Jan. 31, 2024
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Amortized Cost	$ 142,349	$ 130,031
Cash and cash equivalents, Estimated Fair Value	142,349	130,031
Cash and cash equivalents and available for sale securities, Amortized Cost	601,036	279,150
Gross Unrealized Gains	351	130
Gross Unrealized Losses	(46)	(29)
Short-term investments, estimated fair value	458,992	149,220
Cash and cash equivalents and short term investments, Estimated Fair Value	601,341	279,251
Cash
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Amortized Cost	64,905	72,420
Cash and cash equivalents, Estimated Fair Value	64,905	72,420
Level 1:
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value	29,648	47,696
Cash and cash equivalents and available for sale securities, Amortized Cost	268,085	134,125
Gross Unrealized Gains	265	70
Gross Unrealized Losses	(14)	(13)
Short-term investments, estimated fair value	238,688	86,486
Cash and cash equivalents and short term investments, Estimated Fair Value	268,336	134,182
Level 1: | Money market funds
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Amortized Cost	29,648	47,696
Cash and cash equivalents, Estimated Fair Value	29,648	47,696
Level 1: | U.S. Treasuries
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value	0	0
Cash and cash equivalents and available for sale securities, Amortized Cost	238,437	86,429
Gross Unrealized Gains	265	70
Gross Unrealized Losses	(14)	(13)
Short-term investments, estimated fair value	238,688	86,486
Cash and cash equivalents and short term investments, Estimated Fair Value	238,688	86,486
Level 2:
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value	47,796	9,915
Cash and cash equivalents and available for sale securities, Amortized Cost	268,046	72,605
Gross Unrealized Gains	86	60
Gross Unrealized Losses	(32)	(16)
Short-term investments, estimated fair value	220,304	62,734
Cash and cash equivalents and short term investments, Estimated Fair Value	268,100	72,649
Level 2: | Commercial paper
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value	47,796	9,915
Cash and cash equivalents and available for sale securities, Amortized Cost	178,964	33,019
Gross Unrealized Gains	6	3
Gross Unrealized Losses	(25)	(3)
Short-term investments, estimated fair value	131,149	23,104
Cash and cash equivalents and short term investments, Estimated Fair Value	178,945	33,019
Level 2: | Corporate bonds
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value	0	0
Cash and cash equivalents and available for sale securities, Amortized Cost	75,981	17,883
Gross Unrealized Gains	80	30
Gross Unrealized Losses	(7)	(3)
Short-term investments, estimated fair value	76,054	17,910
Cash and cash equivalents and short term investments, Estimated Fair Value	76,054	17,910
Level 2: | U.S. government agencies
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value	0	0
Cash and cash equivalents and available for sale securities, Amortized Cost	13,101	21,703
Gross Unrealized Gains	0	27
Gross Unrealized Losses	0	(10)
Short-term investments, estimated fair value	13,101	21,720
Cash and cash equivalents and short term investments, Estimated Fair Value	$ 13,101	$ 21,720