Equity Plans and Stock-Based Compensation - Fair Value Assumptions for Stock Options (Details) - Stock Options - Weighted Average	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	5 years 9 months 18 days	5 years 8 months 12 days	5 years 10 months 24 days
Expected volatility	63.70%	64.20%	65.20%
Risk-free interest rate	4.00%	4.20%	3.60%
Expected dividend yield	0.00%	0.00%	0.00%