Quarterly report pursuant to Section 13 or 15(d)

Warrants and Derivative Liabilities (Details 5)

v3.19.2
Warrants and Derivative Liabilities (Details 5) - Pricing Model - Series B warrant
Jun. 30, 2019
USD_per_warrants
Dec. 31, 2018
USD_per_warrants
Dividend yield    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input 0.00 0.00
Volatility factor    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input 93.1 93.0
Risk-free interest rate    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input 1.90 2.79
Expected term (years)    
Class of Warrant or Right [Line Items]    
Expected Term 1 year 1 month 21 days  
Expected term (years) | Minimum    
Class of Warrant or Right [Line Items]    
Expected Term   1 year 7 months 21 days
Expected term (years) | Maximum    
Class of Warrant or Right [Line Items]    
Expected Term   1 year 7 months 24 days
Weighted-average fair value of warrants    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input 0.29 0.40