Annual report pursuant to Section 13 and 15(d)

Warrants - Schedule of Fair Value of Warrants Classified as Liabilities (Details)

v3.19.1
Warrants - Schedule of Fair Value of Warrants Classified as Liabilities (Details) - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
October 2013 Warrants [Member]    
Strike price $ 15.00 $ 15.00
Expected dividend yield 0.00% 0.00%
October 2013 Warrants [Member] | Expected Term [Member]    
Fair value assumptions, term 4 years 9 months 18 days 5 years 9 months 18 days
October 2013 Warrants [Member] | Cumulative Volatility [Member]    
Fair value assumptions, percentage 89.64% 86.70%
October 2013 Warrants [Member] | Risk Free Interest Rate [Member]    
Fair value assumptions, percentage 2.59% 2.30%
January 2014 Warrants [Member]    
Strike price $ 15.00 $ 15.00
Expected dividend yield 0.00% 0.00%
January 2014 Warrants [Member] | Expected Term [Member]    
Fair value assumptions, term 5 years 6 years
January 2014 Warrants [Member] | Cumulative Volatility [Member]    
Fair value assumptions, percentage 89.76% 87.70%
January 2014 Warrants [Member] | Risk Free Interest Rate [Member]    
Fair value assumptions, percentage 2.60% 2.31%