Annual report pursuant to Section 13 and 15(d)

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

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Basis of Presentation, Summary of Significant Accounting Policies (Schedule of Antidilutive Securities) (Details) - shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Shares not included in the computation of EPS 4,080,345 2,711,274 5,114,955
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 2,061,770 3,574,257
Option 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 4,015,146 633,305 1,524,499
Convertible Preferred Stock Series B [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Shares not included in the computation of EPS 2,199 4,199 4,199