Equity Incentive Plans and Stock-Based Compensation - Fair Value Assumptions for ESPP Shares (Details) - ESPP - Weighted Average	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	6 months	6 months	7 months 6 days
Expected volatility	67.40%	69.00%	55.70%
Risk-free interest rate	5.02%	1.86%	0.05%
Expected dividend yield	0.00%	0.00%	0.00%