Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Income Statement [Abstract]
Revenue	$ 284,865	$ 226,474	$ 337,606
Cost of revenue	112,535	89,657	128,672
Gross profit	172,330	136,817	208,934
Operating expenses:
Research and development	226,109	215,052	204,946
Selling, general and administrative	72,816	76,325	78,244
Total operating expenses	298,925	291,377	283,190
Loss from operations	(126,595)	(154,560)	(74,256)
Other income, net	8,867	6,030	3,318
Loss before income taxes	(117,728)	(148,530)	(70,938)
Provision (benefit) for income taxes	(602)	20,887	(5,552)
Net loss	$ (117,126)	$ (169,417)	$ (65,386)
Net loss per share attributable to ordinary shareholders:
Basic	$ (2.84)	$ (4.25)	$ (1.7)
Diluted	$ (2.84)	$ (4.25)	$ (1.7)
Weighted-average shares used to compute net loss per share attributable to ordinary shareholders:
Basic	41,303,287	39,878,872	38,363,638
Diluted	41,303,287	39,878,872	38,363,638