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Employee and Consultant Equity-Based Compensation - Black-Scholes Assumptions for Option Granted (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Payment Arrangement [Abstract]      
Expected term (in years) 6 years 3 months 10 days 6 years 3 days 6 years 2 months 23 days
Volatility 60.00% 66.00% 77.00%
Expected dividends $ 0 $ 0 $ 0
Risk free interest rates 2.10% 2.70% 2.10%
Estimated forfeitures 0.00% 0.00% 0.00%
Weighted average fair value (in dollars per share) $ 8.33 $ 14.87 $ 16.24