Annual report pursuant to Section 13 and 15(d)

Fair Value Measurement - Summary of Assumptions Used for Valuation of Fair Value Liabilities (Details)

v3.19.1
Fair Value Measurement - Summary of Assumptions Used for Valuation of Fair Value Liabilities (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Risk Free Interest Rate [Member] | Minimum [Member]    
Fair value assumptions, measurement input, percentages 1.62% 1.47%
Risk Free Interest Rate [Member] | Maximum [Member]    
Fair value assumptions, measurement input, percentages 2.63% 1.98%
Contractual Term (Years) [Member] | Minimum [Member]    
Fair value assumptions, measurement input, term 2 months 30 days 9 months 11 days
Contractual Term (Years) [Member] | Maximum [Member]    
Fair value assumptions, measurement input, term 3 years 2 months 30 days 4 years
Expected Volatility [Member] | Minimum [Member]    
Fair value assumptions, measurement input, percentages 113.00% 112.00%
Expected Volatility [Member] | Maximum [Member]    
Fair value assumptions, measurement input, percentages 217.00% 149.00%
Expected Dividend Yield [Member]    
Fair value assumptions, measurement input, percentages 0.00% 0.00%