Quarterly report pursuant to Section 13 or 15(d)

Warrants and Derivative Liabilities (Details 1)

v3.19.2
Warrants and Derivative Liabilities (Details 1) - Pricing Model - Emerald Multi-Draw Credit Agreement Warrants
Jun. 30, 2019
Percent
$ / shares
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 | Percent 0.00
Volatility factor | Minimum  
Class of Warrant or Right [Line Items]  
Warrants and rights outstanding measurement input 91.6
Volatility factor | Maximum  
Class of Warrant or Right [Line Items]  
Warrants and rights outstanding measurement input 92.1
Risk-free interest rate | Minimum  
Class of Warrant or Right [Line Items]  
Warrants and rights outstanding measurement input 2.23
Risk-free interest rate | Maximum  
Class of Warrant or Right [Line Items]  
Warrants and rights outstanding measurement input 2.51
Expected term (years)  
Class of Warrant or Right [Line Items]  
Expected Term 5 years