Financial Instruments and Fair Value - Schedule of Available-for-Sale Securities at Fair Value (Detail) - USD ($) $ in Thousands	Oct. 31, 2024	Jan. 31, 2024
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 99,781	$ 106,299
Unrealized Gains	149	194
Unrealized Losses	(446)	(377)
Fair Value	99,484	106,116
Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	82	296
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	82	296
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0	30,806
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	0	30,806
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	53,537	38,867
Unrealized Gains	134	180
Unrealized Losses	(148)	(135)
Fair Value	53,523	38,912
Asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	20,688	15,212
Unrealized Gains	15	14
Unrealized Losses	(91)	(96)
Fair Value	20,612	15,130
U.S. government securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	25,474	21,118
Unrealized Gains	0	0
Unrealized Losses	(207)	(146)
Fair Value	$ 25,267	$ 20,972