Real Estate and Accumulated Depreciation (Details 1) (USD $)	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of real estate and accumulated depreciation
Land	$ 39,133,514	[1],[2]
Site, Land & Building Improvements and Rental Homes	409,030,945	[1],[2]
Total	448,164,459		365,824,412	253,490,055	191,252,542
Accumulated Depreciation	90,419,913		76,435,743	65,658,602	58,994,093
Memphis, TN [Member]
Summary of real estate and accumulated depreciation
Land	480,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	10,609,460	[1],[2]
Total	11,089,460	[1],[2]
Accumulated Depreciation	4,411,922	[1],[2]
Orrville, OH [Member]
Summary of real estate and accumulated depreciation
Land	114,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,341,500	[1],[2]
Total	1,455,500	[1],[2]
Accumulated Depreciation	53,598
Birch Run, MI [Member]
Summary of real estate and accumulated depreciation
Land	70,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	3,329,478	[1],[2]
Total	3,399,478	[1],[2]
Accumulated Depreciation	255,376
Goshen, IN [Member]
Summary of real estate and accumulated depreciation
Land	1,120,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	12,863,638	[1],[2]
Total	13,983,638	[1],[2]
Accumulated Depreciation	895,695
Berwick, PA [Member]
Summary of real estate and accumulated depreciation
Land	372,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	5,415,151	[1],[2]
Total	5,787,151	[1],[2]
Accumulated Depreciation	731,483
Greenfield Ctr, NY [Member]
Summary of real estate and accumulated depreciation
Land	122,865	[1],[2]
Site, Land & Building Improvements and Rental Homes	3,841,132	[1],[2]
Total	3,963,997	[1],[2]
Accumulated Depreciation	1,956,851
Chambersburg, PA [Member]
Summary of real estate and accumulated depreciation
Land	176,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,861,569	[1],[2]
Total	3,037,569	[1],[2]
Accumulated Depreciation	223,159
Vineland, NJ [Member]
Summary of real estate and accumulated depreciation
Land	408,206	[1],[2]
Site, Land & Building Improvements and Rental Homes	3,824,562	[1],[2]
Total	4,232,768	[1],[2]
Accumulated Depreciation	2,575,753
Chambersburg, PA 1 [Member]
Summary of real estate and accumulated depreciation
Land	108,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,644,338	[1],[2]
Total	2,752,338	[1],[2]
Accumulated Depreciation	222,658
Sayre, PA [Member]
Summary of real estate and accumulated depreciation
Land	124,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,327,421	[1],[2]
Total	2,451,421	[1],[2]
Accumulated Depreciation	186,335
Lewistown, PA [Member]
Summary of real estate and accumulated depreciation
Land	137,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,557,226	[1],[2]
Total	1,694,226	[1],[2]
Accumulated Depreciation	110,796
Tiffin, OH [Member]
Summary of real estate and accumulated depreciation
Land	142,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	3,371,322	[1],[2]
Total	3,513,322	[1],[2]
Accumulated Depreciation	397,120
Horseheads, NY [Member]
Summary of real estate and accumulated depreciation
Land	196,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	3,002,128	[1],[2]
Total	3,198,128	[1],[2]
Accumulated Depreciation	224,293
Wintersville, OH [Member]
Summary of real estate and accumulated depreciation
Land	67,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	4,722,241	[1],[2]
Total	4,789,241	[1],[2]
Accumulated Depreciation	319,009
Muncie, IN [Member]
Summary of real estate and accumulated depreciation
Land	174,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	3,480,975	[1],[2]
Total	3,654,975	[1],[2]
Accumulated Depreciation	279,946
Ravenna, OH [Member]
Summary of real estate and accumulated depreciation
Land	205,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	3,236,773	[1],[2]
Total	3,441,773	[1],[2]
Accumulated Depreciation	93,711
Columbia, TN [Member]
Summary of real estate and accumulated depreciation
Land	394,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	10,097,292	[1],[2]
Total	10,491,292	[1],[2]
Accumulated Depreciation	1,197,084
Cranberry Twp, PA [Member]
Summary of real estate and accumulated depreciation
Land	181,930	[1],[2]
Site, Land & Building Improvements and Rental Homes	4,373,417	[1],[2]
Total	4,555,347	[1],[2]
Accumulated Depreciation	2,478,191
Sayre, PA 1 [Member]
Summary of real estate and accumulated depreciation
Land	363,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,580,236	[1],[2]
Total	2,943,236	[1],[2]
Accumulated Depreciation	208,796
Duncansville, PA [Member]
Summary of real estate and accumulated depreciation
Land	60,774	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,627,163	[1],[2]
Total	2,687,937	[1],[2]
Accumulated Depreciation	1,026,981
Toronto, OH [Member]
Summary of real estate and accumulated depreciation
Land	275,600	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,744,052	[1],[2]
Total	3,019,652	[1],[2]
Accumulated Depreciation	50,465
New Springfield, OH [Member]
Summary of real estate and accumulated depreciation
Land	226,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,505,326	[1],[2]
Total	2,731,326	[1],[2]
Accumulated Depreciation	74,714
Clifton Park, NY [Member]
Summary of real estate and accumulated depreciation
Land	391,724	[1],[2]
Site, Land & Building Improvements and Rental Homes	3,460,919	[1],[2]
Total	3,852,643	[1],[2]
Accumulated Depreciation	1,726,688
Lodi, OH [Member]
Summary of real estate and accumulated depreciation
Land	99,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,181,214	[1],[2]
Total	1,280,214	[1],[2]
Accumulated Depreciation	35,265
Bedford, OH [Member]
Summary of real estate and accumulated depreciation
Land	49,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,395,492	[1],[2]
Total	2,444,492	[1],[2]
Accumulated Depreciation	87,038
Mantua, OH [Member]
Summary of real estate and accumulated depreciation
Land	105,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,489,280	[1],[2]
Total	1,594,280	[1],[2]
Accumulated Depreciation	42,236
Millville, NJ [Member]
Summary of real estate and accumulated depreciation
Land	2,534,892	[1],[2]
Site, Land & Building Improvements and Rental Homes	7,941,682	[1],[2]
Total	10,476,574	[1],[2]
Accumulated Depreciation	4,270,502
Elkhart, IN [Member]
Summary of real estate and accumulated depreciation
Land	440,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	7,869,604	[1],[2]
Total	8,309,604	[1],[2]
Accumulated Depreciation	589,049
Cranberry Twp, PA 1 [Member]
Summary of real estate and accumulated depreciation
Land	75,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	5,644,683	[1],[2]
Total	5,719,683	[1],[2]
Accumulated Depreciation	2,437,412
Schuylkill Haven, PA [Member]
Summary of real estate and accumulated depreciation
Land	643,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	5,983,295	[1],[2]
Total	6,626,295	[1],[2]
Accumulated Depreciation	501,251
Chambersburg, PA 2 [Member]
Summary of real estate and accumulated depreciation
Land	63,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	589,557	[1],[2]
Total	652,557	[1],[2]
Accumulated Depreciation	51,584
Honey Brook, PA [Member]
Summary of real estate and accumulated depreciation
Land	370,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,281,433	[1],[2]
Total	1,651,433	[1],[2]
Accumulated Depreciation	84,706
Dublin, OH [Member]
Summary of real estate and accumulated depreciation
Land	248,100	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,244,876	[1],[2]
Total	2,492,976	[1],[2]
Accumulated Depreciation	39,748
Inkerman, PA [Member]
Summary of real estate and accumulated depreciation
Land	572,500	[1],[2]
Site, Land & Building Improvements and Rental Homes	8,065,804	[1],[2]
Total	8,638,304	[1],[2]
Accumulated Depreciation	3,976,279
Elkhart, IN 1 [Member]
Summary of real estate and accumulated depreciation
Land	510,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	7,773,293	[1],[2]
Total	8,283,293	[1],[2]
Accumulated Depreciation	567,895
Kutztown, PA [Member]
Summary of real estate and accumulated depreciation
Land	404,239	[1],[2]
Site, Land & Building Improvements and Rental Homes	12,018,691	[1],[2]
Total	12,422,930	[1],[2]
Accumulated Depreciation	5,355,140
Greensburgh, PA [Member]
Summary of real estate and accumulated depreciation
Land	483,600	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,833,079	[1],[2]
Total	3,316,679	[1],[2]
Accumulated Depreciation	51,554
Nashville, TN [Member]
Summary of real estate and accumulated depreciation
Land	1,632,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	8,645,213	[1],[2]
Total	10,277,213	[1],[2]
Accumulated Depreciation	449,681
Peninsula, OH [Member]
Summary of real estate and accumulated depreciation
Land	141,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	3,941,356	[1],[2]
Total	4,082,356	[1],[2]
Accumulated Depreciation	111,142
Clinton, OH [Member]
Summary of real estate and accumulated depreciation
Land	686,400	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,830,902	[1],[2]
Total	3,517,302	[1],[2]
Accumulated Depreciation	52,591
Monticello, NY [Member]
Summary of real estate and accumulated depreciation
Land	352,972	[1],[2]
Site, Land & Building Improvements and Rental Homes	9,005,997	[1],[2]
Total	9,358,969	[1],[2]
Accumulated Depreciation	3,833,077
Navarre, OH [Member]
Summary of real estate and accumulated depreciation
Land	290,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	7,952,938	[1],[2]
Total	8,242,938	[1],[2]
Accumulated Depreciation	2,905,512
Cresson, PA [Member]
Summary of real estate and accumulated depreciation
Land	432,700	[1],[2]
Site, Land & Building Improvements and Rental Homes	4,329,077	[1],[2]
Total	4,761,777	[1],[2]
Accumulated Depreciation	1,544,649
Orrville, OH 1 [Member]
Summary of real estate and accumulated depreciation
Land	113,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,438,129	[1],[2]
Total	1,551,129	[1],[2]
Accumulated Depreciation	49,565
Taylor, PA [Member]
Summary of real estate and accumulated depreciation
Land	674,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	11,165,627	[1],[2]
Total	11,839,627	[1],[2]
Accumulated Depreciation	1,503,215
New Middletown, OH [Member]
Summary of real estate and accumulated depreciation
Land	152,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	4,409,816	[1],[2]
Total	4,561,816	[1],[2]
Accumulated Depreciation	356,493
Wooster, OH [Member]
Summary of real estate and accumulated depreciation
Land	767,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	6,226,370	[1],[2]
Total	6,993,370	[1],[2]
Accumulated Depreciation	229,927
Wooster, OH 1 [Member]
Summary of real estate and accumulated depreciation
Land	94,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,050,633	[1],[2]
Total	1,144,633	[1],[2]
Accumulated Depreciation	41,278
Memphis, TN 1 [Member]
Summary of real estate and accumulated depreciation
Land	335,935	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,505,912	[1],[2]
Total	1,841,847	[1],[2]
Accumulated Depreciation	1,161,152
Ephrata, PA [Member]
Summary of real estate and accumulated depreciation
Land	114,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,239,557	[1],[2]
Total	1,353,557	[1],[2]
Accumulated Depreciation	101,446
Avoca, PA [Member]
Summary of real estate and accumulated depreciation
Land	330,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	4,507,013	[1],[2]
Total	4,837,013	[1],[2]
Accumulated Depreciation	596,707
Ephrata, PA 1 [Member]
Summary of real estate and accumulated depreciation
Land	134,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,051,890	[1],[2]
Total	2,185,890	[1],[2]
Accumulated Depreciation	161,274
Coxsackie, NY [Member]
Summary of real estate and accumulated depreciation
Land	2,218,800	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,036,683	[1],[2]
Total	3,255,483	[1],[2]
Accumulated Depreciation	142,831
Elkhart, IN 2 [Member]
Summary of real estate and accumulated depreciation
Land	500,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	9,014,055	[1],[2]
Total	9,514,055	[1],[2]
Accumulated Depreciation	643,903
Tunkhannock, PA [Member]
Summary of real estate and accumulated depreciation
Land	379,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,949,990	[1],[2]
Total	2,328,990	[1],[2]
Accumulated Depreciation	268,677
Olmsted Falls, OH [Member]
Summary of real estate and accumulated depreciation
Land	569,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	3,709,638	[1],[2]
Total	4,278,638	[1],[2]
Accumulated Depreciation	264,561
West Grove, PA [Member]
Summary of real estate and accumulated depreciation
Land	155,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,610,920	[1],[2]
Total	2,765,920	[1],[2]
Accumulated Depreciation	1,861,355
Carlisle, PA [Member]
Summary of real estate and accumulated depreciation
Land	145,473	[1],[2]
Site, Land & Building Improvements and Rental Homes	6,810,277	[1],[2]
Total	6,955,750	[1],[2]
Accumulated Depreciation	2,167,988
Apollo, PA [Member]
Summary of real estate and accumulated depreciation
Land	732,089	[1],[2]
Site, Land & Building Improvements and Rental Homes	4,793,022	[1],[2]
Total	5,525,111	[1],[2]
Accumulated Depreciation	1,900,600
Bloomsburg, PA [Member]
Summary of real estate and accumulated depreciation
Land	282,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,775,363	[1],[2]
Total	3,057,363	[1],[2]
Accumulated Depreciation	365,881
Belle Vernon, PA [Member]
Summary of real estate and accumulated depreciation
Land	505,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	11,861,680	[1],[2]
Total	12,366,680	[1],[2]
Accumulated Depreciation	5,249,997
Marion, OH [Member]
Summary of real estate and accumulated depreciation
Land	236,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	5,819,053	[1],[2]
Total	6,055,053	[1],[2]
Accumulated Depreciation	2,803,077
Carlisle, PA 1 [Member]
Summary of real estate and accumulated depreciation
Land	301,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,926,712	[1],[2]
Total	2,227,712	[1],[2]
Accumulated Depreciation	115,523
Belle Vernon, PA 1 [Member]
Summary of real estate and accumulated depreciation
Land	813,600	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,261,936	[1],[2]
Total	3,075,536	[1],[2]
Accumulated Depreciation	47,589
Magnolia, OH [Member]
Summary of real estate and accumulated depreciation
Land	270,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	7,545,138	[1],[2]
Total	7,815,138	[1],[2]
Accumulated Depreciation	3,868,316
Nashville, TN 1 [Member]
Summary of real estate and accumulated depreciation
Land	337,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	5,327,025	[1],[2]
Total	5,664,025	[1],[2]
Accumulated Depreciation	565,276
Somerset, PA [Member]
Summary of real estate and accumulated depreciation
Land	1,488,600	[1],[2]
Site, Land & Building Improvements and Rental Homes	7,427,003	[1],[2]
Total	8,915,603	[1],[2]
Accumulated Depreciation	2,200,359
Columbiana, OH [Member]
Summary of real estate and accumulated depreciation
Land	63,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	3,593,625	[1],[2]
Total	3,656,625	[1],[2]
Accumulated Depreciation	297,702
Jackson, NJ [Member]
Summary of real estate and accumulated depreciation
Land	100,095	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,941,356	[1],[2]
Total	3,041,451	[1],[2]
Accumulated Depreciation	1,843,215
Athens, OH [Member]
Summary of real estate and accumulated depreciation
Land	67,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	3,289,381	[1],[2]
Total	3,356,381	[1],[2]
Accumulated Depreciation	1,263,843
Greensburg, PA 1 [Member]
Summary of real estate and accumulated depreciation
Land	299,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	6,862,933	[1],[2]
Total	7,161,933	[1],[2]
Accumulated Depreciation	1,012,803
Ravenna, OH 1 [Member]
Summary of real estate and accumulated depreciation
Land	198,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,965,549	[1],[2]
Total	3,163,549	[1],[2]
Accumulated Depreciation	87,990
Somerset, PA 1 [Member]
Summary of real estate and accumulated depreciation
Land	287,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	6,599,732	[1],[2]
Total	6,886,732	[1],[2]
Accumulated Depreciation	1,051,390
Eagleville, PA [Member]
Summary of real estate and accumulated depreciation
Land	450,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,661,341	[1],[2]
Total	3,111,341	[1],[2]
Accumulated Depreciation	177,682
Goodlettsville, TN [Member]
Summary of real estate and accumulated depreciation
Land	411,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	4,000,953	[1],[2]
Total	4,411,953	[1],[2]
Accumulated Depreciation	389,129
Olmsted Falls, OH 1 [Member]
Summary of real estate and accumulated depreciation
Land	998,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	4,321,541	[1],[2]
Total	5,319,541	[1],[2]
Accumulated Depreciation	321,272
Goshen, IN 1 [Member]
Summary of real estate and accumulated depreciation
Land	650,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	7,339,172	[1],[2]
Total	7,989,172	[1],[2]
Accumulated Depreciation	482,924
Ruffs Dale, PA [Member]
Summary of real estate and accumulated depreciation
Land	284,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,317,612	[1],[2]
Total	2,601,612	[1],[2]
Accumulated Depreciation	43,488
Ravenna, OH 2 [Member]
Summary of real estate and accumulated depreciation
Land	996,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	7,549,040	[1],[2]
Total	8,545,040	[1],[2]
Accumulated Depreciation	213,962
Ephrata, PA 2 [Member]
Summary of real estate and accumulated depreciation
Land	191,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	4,914,107	[1],[2]
Total	5,105,107	[1],[2]
Accumulated Depreciation	409,151
Ephrata, PA 3 [Member]
Summary of real estate and accumulated depreciation
Land	72,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,748,508	[1],[2]
Total	1,820,508	[1],[2]
Accumulated Depreciation	153,686
Doylestown, PA [Member]
Summary of real estate and accumulated depreciation
Land	2,650,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	8,254,008	[1],[2]
Total	10,904,008	[1],[2]
Accumulated Depreciation	550,226
Honey Brook, PA 1 [Member]
Summary of real estate and accumulated depreciation
Land	1,380,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	5,505,821	[1],[2]
Total	6,885,821	[1],[2]
Accumulated Depreciation	391,197
Hamburg, NY [Member]
Summary of real estate and accumulated depreciation
Land	424,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	6,165,158	[1],[2]
Total	6,589,158	[1],[2]
Accumulated Depreciation	2,895,919
Lebanon, TN [Member]
Summary of real estate and accumulated depreciation
Land	1,184,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	8,333,648	[1],[2]
Total	9,517,648	[1],[2]
Accumulated Depreciation	1,947,596
West Monroe, NY [Member]
Summary of real estate and accumulated depreciation
Land	77,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	2,334,572	[1],[2]
Total	2,411,572	[1],[2]
Accumulated Depreciation	666,277
Eatontown, NJ [Member]
Summary of real estate and accumulated depreciation
Land	135,420	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,322,093	[1],[2]
Total	1,457,513	[1],[2]
Accumulated Depreciation	615,534
Caledonia, OH [Member]
Summary of real estate and accumulated depreciation
Land	260,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	5,083,514	[1],[2]
Total	5,343,514	[1],[2]
Accumulated Depreciation	2,186,870
Youngstown, NY [Member]
Summary of real estate and accumulated depreciation
Land	269,000	[1],[2]
Site, Land & Building Improvements and Rental Homes	1,629,054	[1],[2]
Total	1,898,054	[1],[2]
Accumulated Depreciation	$ 64,132

[1] Represents one mortgage note payable secured by two properties.

[2] Represents one mortgage not payable secured by thirteen properties.