Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Fair Value Assumptions (Details)

v3.22.1
Stock-Based Compensation - Fair Value Assumptions (Details) - $ / shares
 12 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2020
Options to purchase common stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected term (in years) 6 years 6 years 1 month 6 days 6 years
Risk-free interest rate, minimum 0.90% 0.30% 1.30%
Risk-free interest rate, maximum 1.40% 0.80% 2.50%
Expected volatility, minimum 50.90% 42.30% 41.90%
Expected volatility, maximum 52.10% 45.50% 42.80%
Expected dividend rate 0.00% 0.00% 0.00%
Fair value of common stock, minimum (in dollars per share) $ 10.96 $ 4.93 $ 4.25
Fair value of common stock, maximum (in dollars per share) $ 14.02 $ 9.07 $ 4.45
ESPP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk-free interest rate, minimum 0.10%    
Risk-free interest rate, maximum 0.30%    
Expected volatility, minimum 49.30%    
Expected volatility, maximum 57.00%    
Expected dividend rate 0.00%    
Fair value of common stock, minimum (in dollars per share) $ 14.27    
Fair value of common stock, maximum (in dollars per share) $ 22.37    
ESPP | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected term (in years) 6 months    
ESPP | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected term (in years) 1 year