Financial Instruments - Schedule of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Apr. 30, 2025	Jan. 31, 2025
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Amortized Cost	$ 283,998	$ 186,331
Cash and cash equivalents, Estimated Fair Value	283,998	186,331
Cash and cash equivalents and available for sale securities, Amortized Cost	761,637	704,765
Gross Unrealized Gains	561	548
Gross Unrealized Losses	(141)	(169)
Cash and cash equivalents and short term investments, Estimated Fair Value	762,057	705,144
Short-term investments, estimated fair value	478,059	518,813
Cash
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Amortized Cost	60,469	75,541
Cash and cash equivalents, Estimated Fair Value	60,469	75,541
Level 1:
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value	219,493	96,423
Cash and cash equivalents and available for sale securities, Amortized Cost	480,999	355,750
Gross Unrealized Gains	433	345
Gross Unrealized Losses	(14)	(76)
Cash and cash equivalents and short term investments, Estimated Fair Value	481,418	356,019
Short-term investments, estimated fair value	261,925	259,596
Level 1: | Money market funds
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Amortized Cost	214,174	96,423
Cash and cash equivalents, Estimated Fair Value	214,174	96,423
Level 1: | U.S. Treasuries
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value	5,319	0
Cash and cash equivalents and available for sale securities, Amortized Cost	266,825	259,327
Gross Unrealized Gains	433	345
Gross Unrealized Losses	(14)	(76)
Cash and cash equivalents and short term investments, Estimated Fair Value	267,244	259,596
Short-term investments, estimated fair value	261,925	259,596
Level 2:
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value	4,036	14,367
Cash and cash equivalents and available for sale securities, Amortized Cost	220,169	273,474
Gross Unrealized Gains	128	203
Gross Unrealized Losses	(127)	(93)
Cash and cash equivalents and short term investments, Estimated Fair Value	220,170	273,584
Short-term investments, estimated fair value	216,134	259,217
Level 2: | Certificate of deposit
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents and available for sale securities, Amortized Cost	7,631
Gross Unrealized Gains	2
Gross Unrealized Losses	0
Cash and cash equivalents and short term investments, Estimated Fair Value	7,633
Short-term investments, estimated fair value	7,633
Level 2: | Commercial paper
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value		14,367
Cash and cash equivalents and available for sale securities, Amortized Cost	44,930	88,732
Gross Unrealized Gains	2	8
Gross Unrealized Losses	(65)	(3)
Cash and cash equivalents and short term investments, Estimated Fair Value	44,867	88,737
Short-term investments, estimated fair value	44,867	74,370
Level 2: | Corporate bonds
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, Estimated Fair Value	4,036	0
Cash and cash equivalents and available for sale securities, Amortized Cost	167,608	184,742
Gross Unrealized Gains	124	195
Gross Unrealized Losses	(62)	(90)
Cash and cash equivalents and short term investments, Estimated Fair Value	167,670	184,847
Short-term investments, estimated fair value	$ 163,634	$ 184,847