Consolidated Statements of Shareholders' Equity - USD ($)		Common Stock [Member]	Series A Cumulative Redeemable Preferred Stock [Member]	Series B Cumulative Redeemable Preferred Stock [Member]	Series C Cumulative Redeemable Preferred Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Undistributed Income (Accumulated Deficit) [Member]	Total
Balance at Dec. 31, 2014		$ 2,437,208	$ 91,595,000	$ 0	$ 0	$ 110,422,454	$ 5,040,236	$ (667,793)	$ 208,827,105
Balance, shares at Dec. 31, 2014		24,372,083
Common Stock Issued with the DRIP	[1]	$ 265,726	0	0	0	24,334,092	0	0	24,599,818
Common Stock Issued with the DRIP, shares	[1]	2,657,255
Common Stock Issued through Restricted Stock Awards		$ 3,500	0	0	0	(3,500)	0	0	0
Common Stock Issued through Restricted Stock Awards, shares		35,000
Common Stock Issued through Stock Options		$ 2,250	0	0	0	167,825	0	0	$ 170,075
Common Stock Issued through Stock Options, shares		22,500							(22,500)
Preferred Stock Issued through Registered Direct Placement, net		$ 0	0	45,030,000	0	(1,987,876)	0	0	$ 43,042,124
Distributions		0	0	0	0	(24,159,503)	0	(2,144,205)	(26,303,708)
Stock Compensation Expense		0	0	0	0	855,768	0	0	855,768
Net Income		0	0	0	0	0	0	2,144,205	2,144,205
Unrealized Net Holding Loss/Gain on Securities Available for Sale Net of Reclassification Adjustment		0	0	0	0	0	(7,134,947)	0	(7,134,947)
Interest Rate Swaps		0	0	0	0	0	37,985	0	37,985
Balance at Dec. 31, 2015		$ 2,708,684	91,595,000	45,030,000	0	109,629,260	(2,056,726)	(667,793)	246,238,425
Balance, shares at Dec. 31, 2015		27,086,838
Common Stock Issued with the DRIP	[1]	$ 196,613	0	0	0	22,204,332	0	0	22,400,945
Common Stock Issued with the DRIP, shares	[1]	1,966,133
Common Stock Issued through Restricted Stock Awards		$ 6,050	0	0	0	(6,050)	0	0	0
Common Stock Issued through Restricted Stock Awards, shares		60,500
Common Stock Issued through Stock Options		$ 27,750	0	0	0	2,457,310	0	0	$ 2,485,060
Common Stock Issued through Stock Options, shares		277,500							(277,500)
Cancellation of Shares Due to Restricted Stock Forfeitures		$ (216)	0	0	0	216	0	0	$ 0
Cancellation of Shares Due to Restricted Stock Forfeitures, shares		(2,160)
Preferred Stock Issued through Registered Direct Placement, net		$ 0	0	50,000,000	0	(879,147)	0	0	49,120,853
Distributions		0	0	0	0	(23,047,908)	0	(11,534,559)	(34,582,467)
Stock Compensation Expense		0	0	0	0	1,064,678	0	0	1,064,678
Net Income		0	0	0	0	0	0	11,534,559	11,534,559
Unrealized Net Holding Loss/Gain on Securities Available for Sale Net of Reclassification Adjustment		0	0	0	0	0	18,772,197	0	18,772,197
Interest Rate Swaps		0	0	0	0	0	(2,283)	0	(2,283)
Balance at Dec. 31, 2016		$ 2,938,881	91,595,000	95,030,000	0	111,422,691	16,713,188	(667,793)	317,031,967
Balance, shares at Dec. 31, 2016		29,388,811
Common Stock Issued with the DRIP		$ 409,536	0	0	0	59,955,654	0	0	60,365,190
Common Stock Issued with the DRIP, shares		4,095,357
Common Stock Issued through Restricted Stock Awards		$ 5,600	0	0	0	(5,600)	0	0	0
Common Stock Issued through Restricted Stock Awards, shares		56,000
Common Stock Issued through Stock Options		$ 54,790	0	0	0	5,380,844	0	0	$ 5,435,634
Common Stock Issued through Stock Options, shares		547,900							(547,900)
Common Stock Issued through Registered Direct Placement, net		$ 140,000	0	0	0	22,378,238	0	0	$ 22,518,238
Common Stock Issued through Registered Direct Placement, net, shares		1,400,000
Preferred Stock Issued through Underwritten Registered Public Offering, net		$ 0	0	0	143,750,000	(4,774,153)	0	0	138,975,847
Preferred Stock Called for Redemption		0	(91,595,000)	0	0	3,488,159	0	(3,488,159)	(91,595,000)
Distributions		0	0	0	0	(31,125,456)	0	(9,179,875)	(40,305,331)
Stock Compensation Expense		0	0	0	0	1,314,491	0	0	1,314,491
Net Income		0	0	0	0	0	0	12,668,034	12,668,034
Unrealized Net Holding Loss/Gain on Securities Available for Sale Net of Reclassification Adjustment		0	0	0	0	0	(5,197,589)	0	(5,197,589)
Interest Rate Swaps		0	0	0	0	0	3,983	0	3,983
Balance at Dec. 31, 2017		$ 3,548,807	$ 0	$ 95,030,000	$ 143,750,000	$ 168,034,868	$ 11,519,582	$ (667,793)	$ 421,215,464
Balance, shares at Dec. 31, 2017		35,488,068

[1] Dividend Reinvestment and Stock Purchase Plan.