Securities Available For Sale - Summary of Available-for-sale Securities (Details) - USD ($)		Dec. 31, 2016	Dec. 31, 2015
Cost		$ 92,038,001	$ 77,066,287
Market Value		$ 108,755,172	$ 75,011,260
Ashford Hospitality Trust, Inc Preferred Stock Series A [Member]
Interest Rate		8.55%	8.55%
Number of Shares		10,000	10,000
Cost		$ 251,205	$ 251,205
Market Value		$ 253,800	$ 252,480
CBL & Associates Properties, Inc Preferred Stock Series D [Member]
Interest Rate		7.375%	7.375%
Number of Shares		2,000	2,000
Cost		$ 50,269	$ 50,269
Market Value		$ 48,900	$ 50,580
CBL & Associates Properties, Inc Preferred Stock Series E [Member]
Interest Rate		6.625%	6.625%
Number of Shares		62,724	62,724
Cost		$ 1,487,145	$ 1,487,144
Market Value		$ 1,440,789	$ 1,564,963
Cedar Realty Trust, Inc Preferred Stock Series B [Member]
Interest Rate		7.25%	7.25%
Number of Shares		58,577	54,596
Cost		$ 1,411,846	$ 1,310,210
Market Value		$ 1,426,126	$ 1,348,510
Chesapeake Lodging Trust Preferred Stock Series A [Member]
Interest Rate		7.75%	7.75%
Number of Shares		20,000	20,000
Cost		$ 500,000	$ 500,000
Market Value		$ 507,806	$ 516,600
Corporate Office Properties Trust Preferred Stock Series L [Member]
Interest Rate		7.375%	7.375%
Number of Shares		26,000	26,000
Cost		$ 650,330	$ 650,330
Market Value		$ 656,760	$ 670,280
Kilroy Realty Corporation Preferred Stock Series G [Member]
Interest Rate		6.875%	6.875%
Number of Shares		34,948	34,948
Cost		$ 844,770	$ 844,770
Market Value		$ 885,932	$ 902,008
LaSalle Hotel Properties Preferred Stock Series H [Member]
Interest Rate		7.50%	7.50%
Number of Shares		40,000	40,000
Cost		$ 982,589	$ 982,589
Market Value		$ 1,002,000	$ 1,006,000
Pennsylvania Real Estate Investment Trust Preferred Stock Series A [Member]
Interest Rate		8.25%	8.25%
Number of Shares		68,800	68,800
Cost		$ 1,720,885	$ 1,720,885
Market Value		$ 1,739,952	$ 1,775,728
Pennsylvania Real Estate Investment Trust Preferred Stock Series B [Member]
Interest Rate		7.375%	7.375%
Number of Shares		40,000	40,000
Cost		$ 1,000,000	$ 1,000,000
Market Value		$ 1,000,000	$ 1,008,400
Retail Properties of America, Inc Preferred Stock Series A [Member]
Interest Rate		7.00%	7.00%
Number of Shares		20,000	20,000
Cost		$ 481,949	$ 481,949
Market Value		$ 500,000	$ 513,000
Stag Industrial, Inc Preferred Stock Series B [Member]
Interest Rate		6.625%	6.625%
Number of Shares		20,100	20,100
Cost		$ 470,007	$ 470,007
Market Value		$ 501,495	$ 509,334
Summit Hotel Properties, Inc Preferred Stock Series B [Member]
Interest Rate		7.875%	7.875%
Number of Shares		20,000	20,000
Cost		$ 500,000	$ 500,000
Market Value		$ 514,780	$ 515,998
Sun Communities, Inc Preferred Stock Series A [Member]
Interest Rate		7.125%	7.125%
Number of Shares		45,000	45,000
Cost		$ 1,117,377	$ 1,117,377
Market Value		$ 1,133,550	$ 1,179,000
Terreno Realty Corporation Preferred Stock Series A [Member]
Interest Rate		7.75%	7.75%
Number of Shares		20,300	20,300
Cost		$ 507,791	$ 507,791
Market Value		$ 512,575	$ 516,840
Urstadt Biddle Properties, Inc Preferred Stock Series F [Member]
Interest Rate		7.125%	7.125%
Number of Shares		30,421	30,421
Cost		$ 756,304	$ 756,305
Market Value		$ 775,735	$ 786,687
Urstadt Biddle Properties, Inc Preferred Stock Series G [Member]
Interest Rate		6.75%	6.75%
Number of Shares		5,000	5,000
Cost		$ 125,000	$ 125,000
Market Value		128,000	130,700
Preferred Stock [Member]
Cost		12,857,467	13,715,687
Market Value		$ 13,028,200	$ 14,219,712
CBL & Associates Properties, Inc [Member]
Number of Shares		1,000,000	135,000
Cost		$ 11,785,016	$ 2,295,133
Market Value		$ 11,500,000	$ 1,669,951
Cousins Properties, Inc [Member]
Number of Shares		105,950
Cost		$ 820,348
Market Value		$ 901,635
Gladstone Commercial Corporation [Member]
Number of Shares		180,000	55,000
Cost		$ 3,199,933	$ 946,184
Market Value		$ 3,618,000	$ 802,450
Government Properties Income Trust [Member]
Number of Shares		810,000	550,000
Cost		$ 15,520,076	$ 11,244,317
Market Value		$ 15,442,650	$ 8,728,500
Monmouth Real Estate Investment Corporation [Member]
Number of Shares	[1]	2,237,588	2,125,270
Cost	[1]	$ 19,231,411	$ 17,855,054
Market Value	[1]	$ 34,100,835	$ 22,230,328
Nobility Homes Inc [Member]
Number of Shares		20,000	20,000
Cost		$ 158,200	$ 158,200
Market Value		$ 315,000	$ 242,000
Parkway Properties Inc [Member]
Number of Shares		33,243	55,000
Cost		$ 628,819	$ 959,887
Market Value		$ 739,657	$ 859,650
Select Income Real Estate Investment Trust [Member]
Number of Shares		740,000	700,000
Cost		$ 17,802,516	$ 16,909,351
Market Value		$ 18,648,000	$ 13,874,000
Senior Housing Properties Trust [Member]
Number of Shares		220,911	175,911
Cost		$ 3,760,406	$ 3,032,483
Market Value		$ 4,181,845	$ 2,610,519
Urstadt Biddle Properties, Inc [Member]
Number of Shares		85,000	55,000
Cost		$ 1,761,151	$ 1,103,323
Market Value		$ 2,049,350	$ 1,058,200
Vereit, Inc [Member]
Number of Shares		500,000	25,000
Cost		$ 4,512,658	$ 202,787
Market Value		4,230,000	198,000
Common Stock [Member]
Cost		79,180,534	63,350,600
Market Value		$ 95,726,972	$ 60,791,548
CubeSmart Preferred Stock Series A [Member]
Interest Rate			7.75%
Number of Shares			2,000
Cost			$ 52,153
Market Value			$ 52,280
Dupont Fabros Technology, Inc Preferred Stock Series A [Member]
Interest Rate			7.875%
Number of Shares			26,412
Cost			$ 657,703
Market Value			$ 668,224
Dupont Fabros Technology, Inc Preferred Stock Series B [Member]
Interest Rate			7.625%
Number of Shares			10,000
Cost			$ 250,000
Market Value			$ 252,100
Getty Realty Corporation [Member]
Number of Shares			135,000
Cost			$ 2,544,483
Market Value			$ 2,315,250
Mack-Cali Realty Corporation [Member]
Number of Shares			135,000
Cost			$ 3,095,616
Market Value			$ 3,152,250
RMR Group, Inc [Member]
Number of Shares			19,712
Cost			$ 256,256
Market Value			$ 284,050
Weingarten Realty Investors [Member]
Number of Shares			80,000
Cost			$ 2,747,526
Market Value			$ 2,766,400

[1] Related entity.