Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Net Loss per Share (Details)

v3.21.2
Significant Accounting Policies - Net Loss per Share (Details) - shares
 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potentially dilutive securities that were excluded from the computation of diluted net loss per share, as they would be anti-dilutive 4,524,059 7,457,654
Warrants    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potentially dilutive securities that were excluded from the computation of diluted net loss per share, as they would be anti-dilutive 13,191 3,224,455
Stock options (Note 6) [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potentially dilutive securities that were excluded from the computation of diluted net loss per share, as they would be anti-dilutive 270,000 220,000
Unvested restricted stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potentially dilutive securities that were excluded from the computation of diluted net loss per share, as they would be anti-dilutive 4,240,868 4,013,199