Financial Instruments and Fair Value - Schedule of Available-for-Sale Securities at Fair Value (Detail) - USD ($) $ in Thousands	Apr. 30, 2025	Jan. 31, 2025
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 117,965	$ 109,725
Unrealized Gains	444	139
Unrealized Losses	(118)	(372)
Fair Value	118,291	109,492
Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	189	849
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	189	849
Fixed deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0	3,000
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	0	3,000
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	62,210	55,138
Unrealized Gains	267	111
Unrealized Losses	(34)	(123)
Fair Value	62,443	55,126
Asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	21,288	20,412
Unrealized Gains	50	20
Unrealized Losses	(50)	(67)
Fair Value	21,288	20,365
U.S. government securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	34,278	30,326
Unrealized Gains	127	8
Unrealized Losses	(34)	(182)
Fair Value	$ 34,371	$ 30,152