Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Summary of Weighted Average Unobservable Inputs (Details)

v3.20.1
Fair Value Measurements - Summary of Weighted Average Unobservable Inputs (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Warrant Derivative Liability [Member] | Measurement Input, Strike Price [Member]    
Derivative liability, measurement input 7.80 5.93
Warrant Derivative Liability [Member] | Measurement Input, Expected Term [Member]    
Derivative liability, measurement input, term 2 years 8 months 12 days 3 years 2 months 12 days
Warrant Derivative Liability [Member] | Measurement Input, Price Volatility [Member]    
Derivative liability, measurement input 91.2 135.5
Warrant Derivative Liability [Member] | Measurement Input, Risk Free Interest Rate [Member]    
Derivative liability, measurement input 2.24 1.98
Warrant Derivative Liability [Member] | Measurement Input, Expected Dividend Rate [Member]    
Derivative liability, measurement input 0.00 0.00
Embedded Conversion Feature [Member] | Measurement Input, Strike Price [Member]    
Derivative liability, measurement input 2.61 3.47
Embedded Conversion Feature [Member] | Measurement Input, Expected Term [Member]    
Derivative liability, measurement input, term 7 months 6 days 9 months 18 days
Embedded Conversion Feature [Member] | Measurement Input, Price Volatility [Member]    
Derivative liability, measurement input 91.2 135.5
Embedded Conversion Feature [Member] | Measurement Input, Risk Free Interest Rate [Member]    
Derivative liability, measurement input 2.36 1.55
Embedded Conversion Feature [Member] | Measurement Input, Expected Dividend Rate [Member]    
Derivative liability, measurement input 0.00 0.00