Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Fair Value of Options Estimated on Date of Grant Using Black-Scholes Option Pricing Model (Details)

v3.21.2
Stock-Based Compensation - Fair Value of Options Estimated on Date of Grant Using Black-Scholes Option Pricing Model (Details) - Stock Options
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Expected option life 5 years 6 months 6 years
Expected volatility 75.37% 73.75%
Risk-free interest rate 0.78% 0.42%
Expected dividend yield 0.00% 0.00%