Stockholders' Equity and Equity Incentive Plans - Fair Value of ESPP Purchase Rights Assumptions (Details) - Purchase rights committed under the ESPP	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility, minimum (as a percent)	28.40%	30.00%	57.60%
Expected volatility, maximum (as a percent)	43.30%	57.60%	64.60%
Risk-free interest rate, minimum	4.20%	4.60%	2.20%
Risk-free interest rate, maximum	5.40%	5.40%	4.80%
Expected dividend yield	0.00%	0.00%	0.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	6 months	6 months	6 months
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	2 years	2 years	2 years