Annual report pursuant to Section 13 and 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
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total Shares of Potential Common Stock Equivalents 3,901,681 3,713,791
Common Stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total Shares of Potential Common Stock Equivalents 2,875,006 2,722,967
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 174,175 138,324