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Earnings Per Share (Schedule of Calculation of Numerator and Denominator in Earnings Per Share) (Details) - USD ($)
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Earnings Per Share [Abstract]    
Net income (loss) $ 1,253,000 $ (2,098,000)
Preferred stock dividends (2,688,000) (2,688,000)
Net (income) attributable to noncontrolling interests (141,000) (148,000)
Net earnings allocated to unvested shares (33,000) (154,000)
Net (loss) attributable to vested common shares $ (1,609,000) $ (5,088,000)
Weighted average number of vested common shares outstanding, basic and diluted 13,144,000 13,086,000
NET (LOSS) PER COMMON SHARE ATTRIBUTABLE TO COMMON SHAREHOLDERS (BASIC AND DILUTED): $ (0.12) $ (0.39)