Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Fair Value of Stock Options Granted is Calculated Using Black Scholes Option Pricing Model with Range of Assumptions (Details)

v3.21.1
Stock-Based Compensation - Fair Value of Stock Options Granted is Calculated Using Black Scholes Option Pricing Model with Range of Assumptions (Details)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Expected term (years) 6 years  
Expected volatility, Minimum 88.00% 83.80%
Expected volatility, Maximum 88.10% 87.10%
Risk-free interest rate, Minimum 0.50% 0.70%
Risk-free interest rate, Maximum 0.90% 1.60%
Expected dividend yield 0.00% 0.00%
Minimum    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Expected term (years)   5 years
Maximum    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Expected term (years)   5 years 10 months 24 days