Segment Reporting - Summary of Significant Segment Expense Included in Consolidated Net Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
Revenue from External Customer [Line Items]
Total revenue	$ 85,872	$ 54,473
Less cost and expense:
Product cost	34,336	21,313
Employee-related	31,459	28,383
Stock-based compensation	26,130	26,036
Semiconductor development cost	6,772	6,374
Tools & equipment	8,066	5,373
Professional services	3,687	4,374
Facilities-related	2,662	2,767
Other segment items	956	1,469
Interest income	(2,160)	(2,320)
Net loss	(24,328)	(37,932)
Product [Member]
Less cost and expense:
Product cost	$ 32,628	$ 19,949