Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Fair Value Assumptions of Options Granted (Details)

v3.21.1
Stock-based Compensation - Fair Value Assumptions of Options Granted (Details)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Risk-free rate 0.97% 0.89%
Stock options    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected volatility 57.00% 53.00%
Expected term (years) 7 years 7 years
Forfeiture rate 5.00% 5.00%