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Financial Instruments and Fair Value - Schedule of Available-for-Sale Securities at Fair Value (Detail) - USD ($) $ in Thousands	Apr. 30, 2023	Jan. 31, 2023
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 102,685	$ 101,686
Unrealized Gains	162	116
Unrealized Losses	(544)	(608)
Fair Value	102,303	101,194
Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,661	7,872
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	1,661	7,872
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	11,442	18,333
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	11,442	18,333
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	36,630	23,472
Unrealized Gains	101	50
Unrealized Losses	(211)	(224)
Fair Value	36,520	23,298
Asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	18,678	18,753
Unrealized Gains	31	44
Unrealized Losses	(149)	(149)
Fair Value	18,560	18,648
U.S. government securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	34,274	33,256
Unrealized Gains	30	22
Unrealized Losses	(184)	(235)
Fair Value	$ 34,120	$ 33,043

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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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