Cash, Cash Equivalents and Short-Term Investments - Schedule of Unrealized Losses Cash Equivalents and Short Term Investment (Details) - USD ($) $ in Thousands	Apr. 30, 2024	Jan. 31, 2024
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	$ 635,578	$ 277,006
Less than 12 months, gross unrealized losses	(1,512)	(439)
12 months or greater, carrying value	40,767	68,064
12 months or greater, gross unrealized losses	(96)	(340)
Fair Value	676,345	345,070
Gross Unrealized Losses	(1,608)	(779)
U.S. Agency securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	36,247	35,979
Less than 12 months, gross unrealized losses	(113)	(53)
12 months or greater, carrying value	9,448	11,386
12 months or greater, gross unrealized losses	(40)	(83)
Fair Value	45,695	47,365
Gross Unrealized Losses	(153)	(136)
Commercial paper
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	37,421	15,462
Less than 12 months, gross unrealized losses	(20)	(2)
12 months or greater, carrying value	0	0
12 months or greater, gross unrealized losses	0	0
Fair Value	37,421	15,462
Gross Unrealized Losses	(20)	(2)
Corporate debt securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	168,986	85,998
Less than 12 months, gross unrealized losses	(675)	(192)
12 months or greater, carrying value	13,195	15,485
12 months or greater, gross unrealized losses	(17)	(58)
Fair Value	182,181	101,483
Gross Unrealized Losses	(692)	(250)
U.S. Treasury securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	392,924	139,567
Less than 12 months, gross unrealized losses	(704)	(192)
12 months or greater, carrying value	18,124	41,193
12 months or greater, gross unrealized losses	(39)	(199)
Fair Value	411,048	180,760
Gross Unrealized Losses	$ (743)	$ (391)