Share-based Compensation - Stock Options Granted to Non-employees (Details) - Non-employee - Employee Stock Option - Consultant |
6 Months Ended | |
---|---|---|
Jun. 30, 2021 |
Jun. 30, 2020 |
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Volatility | 60.00% | |
Risk-free interest rate | 1.60% | |
Term (in years) | 10 years | 10 years |
Dividend yield | 0.00% | 0.00% |
Minimum | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Volatility | 56.00% | |
Risk-free interest rate | 0.60% | |
Maximum | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Volatility | 60.00% | |
Risk-free interest rate | 1.60% |