Stock-Based Compensation - Assumptions for Liability Awards (Details) |
3 Months Ended |
|---|---|
Mar. 31, 2021 | |
| Cash-settled Restricted Stock | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Number of Simulations | 10,000,000 |
| Expected stock volatility | 133.50% |
| 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 | 137.30% |
| Dividend yield | 0.00% |
| Risk-free interest rate | 0.20% |