Consolidated Statements of Stockholders' Equity - USD ($)	Total	Preferred Stock	Common Stock	Additional Paid in Capital	Accumulated Other Comprehensive Income (Loss)	Cumulative Distributions to Stockholders	Accumulated Earnings (Deficit)	Noncontrolling interests	Common Stock	Common Stock Common Stock	Common Stock Additional Paid in Capital	Preferred Stock	Preferred Stock Noncontrolling interests
Balance (in shares) at Dec. 31, 2016		1,610,000	17,539,258
Balance at Dec. 31, 2016	$ 142,466,865	$ 37,156,972	$ 175,348	$ 204,264,868	$ (6,831,940)	$ (89,224,194)	$ (3,074,189)	$ 0
Issuance of common stock, net (in shares)										4,604,500
Issuance of common stock, net	21,186,865			21,140,820						$ 46,045
Cost of issuing common stock	(1,351,239)			(1,351,239)
Restricted stock compensation expense	(6,280)			(6,280)
Increase (decrease) in net unrealized gain on available-for-sale securities, net	(13,268,331)				(13,268,331)
Reclassification adjustment for net loss included in net income	7,482,477				7,482,477
Net income (loss)	4,706,961						4,706,961
Common dividends declared	(11,904,005)					(11,904,005)
Preferred dividends declared	(3,522,036)					(3,522,036)
Balance (in shares) at Dec. 31, 2017		1,610,000	22,143,758
Balance at Dec. 31, 2017	145,791,277	$ 37,156,972	$ 221,393	224,048,169	(12,617,794)	(104,650,235)	1,632,772	0
Issuance of common stock, net (in shares)										1,543,906
Issuance of common stock, net									$ 7,362,452	$ 15,439	$ 7,347,013	$ 99,500	$ 99,500
Cost of issuing common stock	(92,866)			(92,866)
Restricted stock compensation expense	3,427			3,427
Reclassification adjustment for net loss included in net income	12,617,794				12,617,794
Net income (loss)	(5,471,462)						(5,471,462)
Common dividends declared	(6,578,196)					(6,578,196)
Preferred dividends declared	(3,528,588)					(3,528,588)
Balance (in shares) at Dec. 31, 2018		1,610,000	23,687,664
Balance at Dec. 31, 2018	$ 150,203,338	$ 37,156,972	$ 236,832	$ 231,305,743	$ 0	$ (114,757,019)	$ (3,838,690)	$ 99,500