Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Income Statement [Abstract]
Revenue	$ 63,724	$ 62,121	$ 118,197	$ 124,263
Cost of revenue	24,983	23,659	46,296	48,282
Gross profit	38,741	38,462	71,901	75,981
Operating expenses:
Research and development	56,760	54,917	110,897	109,358
Selling, general and administrative	18,268	18,884	36,736	37,504
Total operating expenses	75,028	73,801	147,633	146,862
Loss from operations	(36,287)	(35,339)	(75,732)	(70,881)
Other income, net	2,145	737	4,416	2,023
Loss before income taxes	(34,142)	(34,602)	(71,316)	(68,858)
Provision (benefit) for income taxes	747	(3,404)	1,505	(1,758)
Net loss	$ (34,889)	$ (31,198)	$ (72,821)	$ (67,100)
Net loss per share attributable to ordinary shareholders:
Basic	$ (0.85)	$ (0.79)	$ (1.78)	$ (1.7)
Diluted	$ (0.85)	$ (0.79)	$ (1.78)	$ (1.7)
Weighted-average shares used to compute net loss per share attributable to ordinary shareholders:
Basic	41,129,754	39,736,704	40,952,373	39,538,748
Diluted	41,129,754	39,736,704	40,952,373	39,538,748