Income Taxes - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Income Tax Disclosure [Abstract]
Tax at federal statutory rate	21.00%	21.00%	21.00%
State income taxes, net of federal benefit	3.70%	3.80%	3.60%
Change in valuation allowance	27.40%	(5.60%)	(9.90%)
Stock-based compensation	14.50%	(28.40%)	(11.90%)
Effect of foreign operations	8.10%	(0.70%)	(1.00%)
Research and development credits	(51.70%)	5.30%	2.60%
Non-deductible expenses	19.20%	(1.50%)	(6.20%)
Provision to return true-up	(7.10%)	0.20%	0.00%
Unrecognized tax benefits	7.90%	0.00%	0.00%
Other, net	(4.00%)	0.60%	0.20%
Effective tax rate	39.00%	(5.30%)	(1.60%)