Marketable Securities - Summary of Marketable Securities (Details) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 358,335	$ 116,275
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(619)	(335)
Estimated Fair Value	357,716	115,940
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	62,470	15,343
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	62,470	15,343
Treasury bills
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	234,848
Gross Unrealized Gains	0
Gross Unrealized Losses	(308)
Estimated Fair Value	234,540
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	46,684	91,735
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(198)	(303)
Estimated Fair Value	46,486	91,432
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	6,374	9,197
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(66)	(32)
Estimated Fair Value	6,308	$ 9,165
Agency bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,959
Gross Unrealized Gains	0
Gross Unrealized Losses	(47)
Estimated Fair Value	7,912
Cash and cash equivalents \| Treasury bills
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	10,000
Estimated Fair Value	$ 10,000

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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