Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Fair Value Assumptions (Details)

v3.21.2
Stock-Based Compensation - Fair Value Assumptions (Details) - $ / shares
3 Months Ended 6 Months Ended
Jul. 31, 2021
Jul. 31, 2021
Jul. 31, 2020
Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected term (in years)   6 years 6 years
Risk-free interest rate, minimum   0.90% 0.40%
Risk-free interest rate, maximum   1.40% 0.80%
Expected volatility, minimum   50.90% 42.30%
Expected volatility, maximum   52.10% 45.30%
Expected dividend rate   0.00% 0.00%
Fair value of common stock (in dollars per share)     $ 4.93
Stock options | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair value of common stock (in dollars per share)   $ 10.96  
Stock options | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair value of common stock (in dollars per share)   $ 14.02  
ESPP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected term (in years) 10 months 24 days    
Risk-free interest rate, minimum 0.05%    
Risk-free interest rate, maximum 0.08%    
Expected volatility, minimum 55.70%    
Expected volatility, maximum 57.00%    
Expected dividend rate 0.00%    
Fair value of common stock (in dollars per share) $ 22.37