Consolidated Statements of Comprehensive Income (Loss) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net Income (Loss)	$ (36,215,571)	$ 12,668,034	$ 11,534,559
Other Comprehensive Income (Loss):
Unrealized Holding Gains (Losses) Arising During the Year	0	(3,450,061)	21,057,498
Reclassification Adjustment for Net Gains Realized in Income	0	(1,747,528)	(2,285,301)
Change in Fair Value of Interest Rate Swap Agreements	0	3,983	(2,283)
Comprehensive Income (Loss)	(36,215,571)	7,474,428	30,304,473
Less: Preferred Dividends	(20,315,944)	(16,844,812)	(14,103,432)
Less: Redemption of Preferred Stock	0	(3,502,487)	0
Comprehensive Income (Loss) Attributable to Common Shareholders	$ (56,531,515)	$ (12,872,871)	$ 16,201,041