Quarterly report pursuant to Section 13 or 15(d)

Basis of presentation, Summary of Significant Accounting Policies (Schedule of Antidilutive Securities) (Details)

v3.21.2
Basis of presentation, Summary of Significant Accounting Policies (Schedule of Antidilutive Securities) (Details) - shares
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Shares not included in the computation of EPS 4,301,215 4,588,349
Warrants to purchase common stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Shares not included in the computation of EPS 63,000 3,354,257
Options to purchase common stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Shares not included in the computation of EPS 12,000 12,000
Unvested restricted stock awards [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Shares not included in the computation of EPS 4,224,016 1,217,893
Convertible Series B Preferred Shares [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Shares not included in the computation of EPS 2,199 4,199