Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Net Loss per Share - Basic and Diluted (Details)

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Summary of Significant Accounting Policies - Net Loss per Share - Basic and Diluted (Details) - shares
 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total Shares of Potential Common Stock Equivalents 3,749,012 3,744,563
Common Stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total Shares of Potential Common Stock Equivalents 2,716,300 2,746,317
Preferred Stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total Shares of Potential Common Stock Equivalents 852,500 852,500
Employee Stock Options    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total Shares of Potential Common Stock Equivalents 180,212 145,746