Income Taxes - Schedule of Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Amount
Pretax book loss (consolidated)	$ (184,167)	$ (250,771)	$ (253,325)
US federal statutory income tax rate	(38,675)
State and local income tax, net of federal income tax effect	154
Effect of cross-border tax laws
Net CFC tested income (previously GILTI)	2,019
Tax credits
Research and development credits	(18,381)
Changes in valuation allowances	42,848
Non-taxable or non-deductible items
Stock based compensation expense	10,031
Other non-deductible items	4,504
Other	145
Total provision for income taxes	$ 4,857	$ 4,765	$ 3,705
Percent
US federal statutory income tax rate	21.00%	21.00%	21.00%
State and local income tax, net of federal income tax effect	(0.10%)
Foreign tax effects		(3.90%)	0.00%
Effect of cross-border tax laws
Net CFC tested income (previously GILTI)	(1.10%)
Tax credits
Research and development credits	10.00%
Changes in valuation allowances	(23.30%)	(21.20%)	(21.40%)
Non-taxable or non-deductible items
Stock based compensation expense	(5.40%)	(3.30%)	(3.60%)
Other non-deductible items	(2.40%)
Other	(0.10%)	(1.90%)	(1.00%)
Effective income tax rate	(2.60%)	(1.90%)	(1.50%)
Canada
Amount
Foreign tax effects	$ 1,980
Percent
Foreign tax effects	(1.10%)
Stock based compensation expense
Amount
Foreign tax effects	$ 232
Percent
Foreign tax effects	(0.10%)