Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Income Statement [Abstract]
Revenue	$ 50,595	$ 83,096	$ 174,858	$ 254,285
Cost of revenue	20,612	31,418	68,894	94,996
Gross profit	29,983	51,678	105,964	159,289
Operating expenses:
Research and development	53,702	52,864	163,060	151,892
Selling, general and administrative	18,246	18,944	55,750	58,213
Total operating expenses	71,948	71,808	218,810	210,105
Loss from operations	(41,965)	(20,130)	(112,846)	(50,816)
Other income, net	1,900	(1,433)	3,923	1,493
Loss before income taxes	(40,065)	(18,697)	(108,923)	(49,323)
Provision (benefit) for income taxes	1,645	1,112	(113)	4,958
Net loss	$ (41,710)	$ (19,809)	$ (108,810)	$ (54,281)
Net income loss per share attributable to ordinary shareholders:
Basic	$ (1.04)	$ (0.51)	$ (2.74)	$ (1.42)
Diluted	$ (1.04)	$ (0.51)	$ (2.74)	$ (1.42)
Weighted-average shares used to compute net loss per share attributable to ordinary shareholders:
Basic	40,053,251	38,582,584	39,710,248	38,185,421
Diluted	40,053,251	38,582,584	39,710,248	38,185,421