Stock-Based Compensation - Assumptions for Liability Awards (Details) |
9 Months Ended |
|---|---|
Sep. 30, 2020 | |
| Cash-settled Restricted Stock | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Number of Simulations | 10,000,000 |
| Expected stock volatility | 113.80% |
| Dividend yield | 0.00% |
| Risk-free interest rate | 0.20% |
| Cash-settled Performance Stock | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Number of Simulations | 10,000,000 |
| Expected stock volatility | 118.50% |
| Dividend yield | 0.00% |
| Risk-free interest rate | 0.20% |