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Mezzanine and Stockholders' Equity - Stock Option Activity Under Black-Scholes Option (Details) - Board Members
3 Months Ended
Mar. 31, 2020
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected term 3 years
Expected volatility 90.01%
Risk-free interest rate 1.43%
Market value of common stock (in dollars per share) $ 10.56
Annual dividend yield 0.00%
Forfeiture rate 0.00%