Financial Instruments and Fair Value - Schedule of Available-for-Sale Securities at Fair Value (Detail) - USD ($) $ in Thousands	Apr. 30, 2024	Jan. 31, 2024
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 97,561	$ 106,299
Unrealized Gains	37	194
Unrealized Losses	(609)	(377)
Fair Value	96,989	106,116
Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,061	296
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	4,061	296
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	15,781	30,806
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	15,781	30,806
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	42,221	38,867
Unrealized Gains	37	180
Unrealized Losses	(297)	(135)
Fair Value	41,961	38,912
Asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	12,309	15,212
Unrealized Gains	0	14
Unrealized Losses	(123)	(96)
Fair Value	12,186	15,130
U.S. government securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	23,189	21,118
Unrealized Gains	0	0
Unrealized Losses	(189)	(146)
Fair Value	$ 23,000	$ 20,972