Marketable Securities - Summary of Marketable Securities (Details) - USD ($) $ in Thousands	Oct. 31, 2022	Jan. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 229,441	$ 116,275
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(916)	(335)
Estimated Fair Value	228,525	115,940
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	50,288	15,343
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	50,288	15,343
Treasury bills
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	107,722
Gross Unrealized Gains	0
Gross Unrealized Losses	(223)
Estimated Fair Value	107,499
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	56,701	91,735
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(501)	(303)
Estimated Fair Value	56,200	91,432
Municipal and agency bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	14,730	9,197
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(192)	(32)
Estimated Fair Value	14,538	$ 9,165
Cash and cash equivalents \| Treasury bills
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	89,700
Estimated Fair Value	$ 89,600

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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