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, 2020
Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 4,147,411 7,671,286
Warrants (Note 6) [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 57,515 4,207,447
Stock options (Note 6) [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 220,000 160,000
Unvested restricted stock (Note 6) [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 3,869,896 3,303,839