Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2024	Oct. 31, 2023
Income Statement [Abstract]
Revenue	$ 82,653	$ 50,595	$ 200,850	$ 174,858
Cost of revenue	32,605	20,612	78,901	68,894
Gross profit	50,048	29,983	121,949	105,964
Operating expenses:
Research and development	58,389	53,702	169,286	163,060
Selling, general and administrative	17,169	18,246	53,905	55,750
Total operating expenses	75,558	71,948	223,191	218,810
Loss from operations	(25,510)	(41,965)	(101,242)	(112,846)
Other income, net	2,091	1,900	6,507	3,923
Loss before income taxes	(23,419)	(40,065)	(94,735)	(108,923)
Provision (benefit) for income taxes	652	1,645	2,157	(113)
Net loss	$ (24,071)	$ (41,710)	$ (96,892)	$ (108,810)
Net loss per share attributable to ordinary shareholders:
Basic	$ (0.58)	$ (1.04)	$ (2.36)	$ (2.74)
Diluted	$ (0.58)	$ (1.04)	$ (2.36)	$ (2.74)
Weighted-average shares used to compute net loss per share attributable to ordinary shareholders:
Basic	41,479,459	40,053,251	41,128,068	39,710,248
Diluted	41,479,459	40,053,251	41,128,068	39,710,248