Quarterly report pursuant to Section 13 or 15(d)

Net Loss per Common Share (Schedule of Diluted Weighted Average Shares Outstanding) (Details)

v3.21.1
Net Loss per Common Share (Schedule of Diluted Weighted Average Shares Outstanding) (Details) - shares
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potentially dilutive securities excluded from the computations of diluted weighted average shares outstanding 22,057,156 18,659,296
Warrants [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potentially dilutive securities excluded from the computations of diluted weighted average shares outstanding 4,579,954 2,653,234
Employee Stock Option [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potentially dilutive securities excluded from the computations of diluted weighted average shares outstanding 853,490 1,210,502
Unvested Restricted Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potentially dilutive securities excluded from the computations of diluted weighted average shares outstanding 16,391,786 14,307,564
Unvested Restricted Stock Units [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potentially dilutive securities excluded from the computations of diluted weighted average shares outstanding 231,926 487,996