Equity Plans and Stock-Based Compensation - Fair Value Assumptions (Details) - Employee stock purchase plan	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility, minimum	62.30%	64.90%	61.80%
Expected volatility, maximum	70.80%	72.20%	73.50%
Risk-free interest rate, minimum	4.50%	0.80%	0.10%
Risk-free interest rate, maximum	5.40%	3.60%	0.30%
Dividend rate	0.00%	0.00%	0.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	6 months	6 months	4 months 24 days
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	2 years	2 years	1 year 10 months 24 days