Financial Instruments - Schedule of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Jan. 31, 2025	Jan. 31, 2024
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Amortized Cost	$ 186,331	$ 130,031
Cash and cash equivalents, Estimated Fair Value	186,331	130,031
Cash and cash equivalents and available for sale securities, Amortized Cost	704,765	279,150
Gross Unrealized Gains	548	130
Gross Unrealized Losses	(169)	(29)
Cash and cash equivalents and short term investments, Estimated Fair Value	705,144	279,251
Short-term investments, estimated fair value	518,813	149,220
Cash
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Amortized Cost	75,541	72,420
Cash and cash equivalents, Estimated Fair Value	75,541	72,420
Level 1:
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value	96,423	47,696
Cash and cash equivalents and available for sale securities, Amortized Cost	355,750	134,125
Gross Unrealized Gains	345	70
Gross Unrealized Losses	(76)	(13)
Cash and cash equivalents and short term investments, Estimated Fair Value	356,019	134,182
Short-term investments, estimated fair value	259,596	86,486
Level 1: | Money market funds
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Amortized Cost	96,423	47,696
Cash and cash equivalents, Estimated Fair Value	96,423	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	259,327	86,429
Gross Unrealized Gains	345	70
Gross Unrealized Losses	(76)	(13)
Cash and cash equivalents and short term investments, Estimated Fair Value	259,596	86,486
Short-term investments, estimated fair value	259,596	86,486
Level 2:
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value	14,367	9,915
Cash and cash equivalents and available for sale securities, Amortized Cost	273,474	72,605
Gross Unrealized Gains	203	60
Gross Unrealized Losses	(93)	(16)
Cash and cash equivalents and short term investments, Estimated Fair Value	273,584	72,649
Short-term investments, estimated fair value	259,217	62,734
Level 2: | Commercial paper
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value	14,367	9,915
Cash and cash equivalents and available for sale securities, Amortized Cost	88,732	33,019
Gross Unrealized Gains	8	3
Gross Unrealized Losses	(3)	(3)
Cash and cash equivalents and short term investments, Estimated Fair Value	88,737	33,019
Short-term investments, estimated fair value	74,370	23,104
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	184,742	17,883
Gross Unrealized Gains	195	30
Gross Unrealized Losses	(90)	(3)
Cash and cash equivalents and short term investments, Estimated Fair Value	184,847	17,910
Short-term investments, estimated fair value	$ 184,847	17,910
Level 2: | U.S. government agencies
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value		0
Cash and cash equivalents and available for sale securities, Amortized Cost		21,703
Gross Unrealized Gains		27
Gross Unrealized Losses		(10)
Cash and cash equivalents and short term investments, Estimated Fair Value		21,720
Short-term investments, estimated fair value		$ 21,720