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Financial Instruments and Fair Value - Schedule of Available-for-Sale Securities at Fair Value (Detail) - USD ($) $ in Thousands	Jul. 31, 2024	Jan. 31, 2024
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 98,657	$ 106,299
Unrealized Gains	108	194
Unrealized Losses	(273)	(377)
Fair Value	98,492	106,116
Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,299	296
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	1,299	296
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	17,857	30,806
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	17,857	30,806
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	44,533	38,867
Unrealized Gains	103	180
Unrealized Losses	(108)	(135)
Fair Value	44,528	38,912
Asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	11,003	15,212
Unrealized Gains	4	14
Unrealized Losses	(67)	(96)
Fair Value	10,940	15,130
U.S. government securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	23,965	21,118
Unrealized Gains	1	0
Unrealized Losses	(98)	(146)
Fair Value	$ 23,868	$ 20,972

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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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