Segment Reporting - Summary of Significant Segment Expense Included in Consolidated Net Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Revenue from External Customer [Line Items]
Total revenue	$ 284,865	$ 226,474	$ 337,606
Less cost and expense:
Product cost	112,535	89,657	128,672
Employee-related	115,188	110,601	109,444
Stock-based compensation	108,043	111,316	111,158
Chip development NRE	28,049	24,680	19,684
Tools & equipment	26,089	23,202	21,559
Professional services	14,359	13,012	13,692
Facilities-related	10,765	10,983	10,329
Other segment items	1,988	26,713	(2,817)
Interest income	(8,727)	(7,837)	(2,103)
Net loss	(117,126)	(169,417)	(65,386)
Product [Member]
Less cost and expense:
Product cost	$ 106,237	$ 83,221	$ 122,046