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Warrants and Derivative Liabilities (Details 2) - Emerald Multi-Draw Credit Agreement Warrants - Black-Scholes option pricing model | Dec. 31, 2019 $ / shares | Nov. 01, 2018 $ / shares
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Class of Warrant or Right [Line Items] |  |
Underlying common stock price |  | $ 0.36
Minimum |  |
Class of Warrant or Right [Line Items] |  |
Underlying common stock price | $ 0.33 |
Maximum |  |
Class of Warrant or Right [Line Items] |  |
Underlying common stock price | $ 0.69 |
Dividend yield |  |
Class of Warrant or Right [Line Items] |  |
Warrants and rights outstanding measurement input (in percent) | 0.0000 | 0
Volatility factor |  |
Class of Warrant or Right [Line Items] |  |
Warrants and rights outstanding measurement input (in percent) |  | 92.5
Volatility factor | Minimum |  |
Class of Warrant or Right [Line Items] |  |
Warrants and rights outstanding measurement input (in percent) | 91.6 |
Volatility factor | Maximum |  |
Class of Warrant or Right [Line Items] |  |
Warrants and rights outstanding measurement input (in percent) | 0.921 |
Risk-free interest rate |  |
Class of Warrant or Right [Line Items] |  |
Warrants and rights outstanding measurement input (in percent) |  | 2.96
Risk-free interest rate | Minimum |  |
Class of Warrant or Right [Line Items] |  |
Warrants and rights outstanding measurement input (in percent) | 0.0223 |
Risk-free interest rate | Maximum |  |
Class of Warrant or Right [Line Items] |  |
Warrants and rights outstanding measurement input (in percent) | 0.0251 |
Expected term (years) |  |
Class of Warrant or Right [Line Items] |  |
Expected Term (years) | 5 years | 5 years

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