Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of the weighted average significant unobservable inputs (Level 3 inputs) used in measuring the Company's warrant liability that is categorized within Level 3 of the fair value hierarchy (Details)

v3.19.3
Fair Value Measurements - Summary of the weighted average significant unobservable inputs (Level 3 inputs) used in measuring the Company's warrant liability that is categorized within Level 3 of the fair value hierarchy (Details) - Warrant [Member]
Sep. 30, 2019
$ / shares
Dec. 31, 2018
$ / shares
Aug. 31, 2018
Y
$ / shares
Common Stock Price     $ 4.30
Measurement Input, Expected Term [Member]      
Warrants and Rights Outstanding, Measurement Input | Y     3
Measurement Input, Price Volatility [Member]      
Warrants and Rights Outstanding, Measurement Input     60
Measurement Input, Risk Free Interest Rate [Member]      
Warrants and Rights Outstanding, Measurement Input     2.88
Measurement Input, Expected Dividend Rate [Member]      
Warrants and Rights Outstanding, Measurement Input     0
Significant unobservable inputs (Level 3) [Member]      
Common Stock Price $ 0.90 $ 3.42  
Significant unobservable inputs (Level 3) [Member] | Measurement Input, Expected Term [Member]      
Warrants and Rights Outstanding, Measurement Input 3.52 4.27  
Significant unobservable inputs (Level 3) [Member] | Measurement Input, Price Volatility [Member]      
Warrants and Rights Outstanding, Measurement Input 58 58  
Significant unobservable inputs (Level 3) [Member] | Measurement Input, Risk Free Interest Rate [Member]      
Warrants and Rights Outstanding, Measurement Input 1.56 2.58  
Significant unobservable inputs (Level 3) [Member] | Measurement Input, Expected Dividend Rate [Member]      
Warrants and Rights Outstanding, Measurement Input 0.00 0.00