Earnings Per Share (Schedule of Calculation of Numerator and Denominator in Earnings Per Share) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net (loss) income	$ (1,077,000)	$ 1,253,000
Preferred stock dividends	(2,688,000)	(2,688,000)
Net loss (income) attributable to noncontrolling interests	20,000	(141,000)
Net earnings allocated to unvested shares	(23,000)	(33,000)
Net (loss) attributable to vested common shares	$ (3,768,000)	$ (1,609,000)
Weighted average number of vested common shares outstanding, basic and diluted	13,285,000	13,144,000
Net (loss) per common share attributable to common shareholders, basic and diluted	$ (0.28)	$ (0.12)