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)

v3.19.2
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) - Significant unobservable inputs (Level 3) [Member] - Warrant [Member]
Jun. 30, 2019
$ / shares
Dec. 31, 2018
$ / shares
Common Stock Price $ 1.16 $ 3.42
Measurement Input, Expected Term [Member]    
Warrants and Rights Outstanding, Measurement Input 3.77 4.27
Measurement Input, Price Volatility [Member]    
Warrants and Rights Outstanding, Measurement Input 59 58
Measurement Input, Risk Free Interest Rate [Member]    
Warrants and Rights Outstanding, Measurement Input 1.74 2.58
Measurement Input, Expected Dividend Rate [Member]    
Warrants and Rights Outstanding, Measurement Input 0.00 0.00