Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies - Net Loss per Share (Details)

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Significant Accounting Policies - Net Loss per Share (Details) - shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 7,671,286 7,273,078
Warrants (Note 6)    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 4,207,447 4,280,972
Stock options (Note 6)    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 160,000 60,000
Unvested restricted stock (Note 6)    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 3,303,839 2,932,106