Annual report pursuant to Section 13 and 15(d)

Warrants and Derivative Liabilities (Details 2)

v3.19.1
Warrants and Derivative Liabilities (Details 2) - Monte Carlo simulations - Emerald Financing Warrant Liability
Dec. 31, 2018
USD_per_warrants
$ / shares
Feb. 16, 2018
USD_per_warrants
$ / shares
Jan. 19, 2018
USD_per_warrants
$ / shares
Class of Warrant or Right [Line Items]      
Underlying common stock price | $ / shares $ 0.40    
Minimum      
Class of Warrant or Right [Line Items]      
Underlying common stock price | $ / shares   $ 0.29 $ 0.29
Maximum      
Class of Warrant or Right [Line Items]      
Underlying common stock price | $ / shares   $ 0.30 $ 0.30
Dividend yield      
Class of Warrant or Right [Line Items]      
Warrants and rights outstanding measurement input 0.00 0.00 0.00
Volatility factor      
Class of Warrant or Right [Line Items]      
Warrants and rights outstanding measurement input   70.00 70.00
Volatility factor | Minimum      
Class of Warrant or Right [Line Items]      
Warrants and rights outstanding measurement input 92.1    
Volatility factor | Maximum      
Class of Warrant or Right [Line Items]      
Warrants and rights outstanding measurement input 92.4    
Risk-free interest rate      
Class of Warrant or Right [Line Items]      
Warrants and rights outstanding measurement input 2.49    
Risk-free interest rate | Minimum      
Class of Warrant or Right [Line Items]      
Warrants and rights outstanding measurement input   2.45 2.45
Risk-free interest rate | Maximum      
Class of Warrant or Right [Line Items]      
Warrants and rights outstanding measurement input   2.6 2.6
Expected term (years)      
Class of Warrant or Right [Line Items]      
Expected Term   5 years 5 years
Expected term (years) | Minimum      
Class of Warrant or Right [Line Items]      
Expected Term 4 years 18 days    
Expected term (years) | Maximum      
Class of Warrant or Right [Line Items]      
Expected Term 4 years 1 month 17 days