Stock Based Compensation and Unit-Based Compensation - Assumptions used in Computing Estimated Fair Value of Each Stock Option Award (Details) |
3 Months Ended | 9 Months Ended |
---|---|---|
Sep. 30, 2019 |
Sep. 30, 2019 |
|
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||
Risk-Free Interest Rate, minimum | 1.38% | 1.38% |
Risk-Free Interest Rate, maximum | 1.94% | 2.60% |
Expected Volatility, minimum | 102.66% | 78.97% |
Expected Volatility, maximum | 103.79% | 103.79% |
Expected Dividend Yield (%) | 0.00% | 0.00% |
Minimum | ||
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||
Expected Term (Years) | 5 years | 8 months 12 days |
Maximum | ||
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||
Expected Term (Years) | 6 years 1 month 6 days | 6 years 2 months 12 days |