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Net Loss Per Share - Schedule of Number of Shares of Common Stock Underlying Potentially Dilutive Securities (Details) - shares
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Common stock dilutive securities 762,074 482,630
Warrants    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Common stock dilutive securities 10,974 317,630
Options to purchase common stock    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Common stock dilutive securities 751,100 165,000