INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Income) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Oct. 28, 2009	Oct. 03, 2005	Mar. 02, 2005	Sep. 30, 2004	Aug. 31, 2004	Nov. 30, 2001
Investment Properties
Revenues
Rental income	$ 5,738,326	$ 5,899,236	$ 17,667,215	$ 18,015,365
Laundry and Sundry Income	36,155	35,733	114,458	121,767
Total Revenues	5,774,481	5,934,969	17,781,673	18,137,132
Expenses
Administrative	78,977	78,481	228,243	247,198
Depreciation and amortization	1,560,489	1,490,841	4,550,497	4,445,477
Management Fees	148,298	167,430	500,439	521,231
Operating	383,153	411,294	1,313,650	1,305,617
Renting	118,612	166,929	217,329	256,965
Repairs and Maintenance	945,909	905,924	2,319,272	2,315,834
Taxes and Insurance	733,656	721,094	2,236,868	2,157,764
Total Expenses	3,969,094	3,941,993	11,366,298	11,250,086
Income Before Other Income	1,805,387	1,992,976	6,415,375	6,887,046
Other Income (loss)
Interest Expense	(1,645,737)	(1,739,192)	(4,933,332)	(5,320,441)
Interest Income		1		10
Gain on Sale of Real Estate	1,865,705	901,980	4,236,349	1,137,450
Total Other Income (Loss)	219,968	(837,211)	(696,983)	(4,182,981)
Net Income (Loss)	2,025,355	1,155,765	5,718,392	2,704,065
Proportionate share of net income (loss)	990,169	562,584	2,721,231	1,220,666
Investment Properties | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	900,132	501,395	2,169,362	695,197
Investment Properties | NERA 40%
Other Income (loss)
Proportionate share of net income (loss)	90,037	61,189	551,869	525,469
Hamilton Essex 81
Revenues
Rental income		371,228
Laundry and Sundry Income		2,675
Total Revenues		373,903
Expenses
Administrative		5,660
Depreciation and amortization		113,626
Management Fees		17,216
Operating		24,073
Renting		16,965
Repairs and Maintenance		44,248
Taxes and Insurance		56,037
Total Expenses		277,825
Income Before Other Income		96,078
Other Income (loss)
Interest Expense		(72,768)
Total Other Income (Loss)		(72,768)
Net Income (Loss)		23,310
Hamilton Essex 81 | NERA 50%
Revenues
Rental income	397,458		1,120,743	1,139,145
Laundry and Sundry Income	2,825		10,415	11,032
Total Revenues	400,283		1,131,158	1,150,177
Expenses
Administrative	10,470		20,400	25,757
Depreciation and amortization	114,334		341,332	338,820
Management Fees	15,011		46,989	47,267
Operating	15,471		55,178	74,431
Renting	17,102		26,618	23,804
Repairs and Maintenance	87,270		136,821	120,332
Taxes and Insurance	59,780		180,881	171,345
Total Expenses	319,438		808,219	801,756
Income Before Other Income	80,845		322,939	348,421
Other Income (loss)
Interest Expense	(91,838)		(256,232)	(214,415)
Total Other Income (Loss)	(91,838)		(256,232)	(214,415)
Net Income (Loss)	(10,993)		66,707	134,006
Proportionate share of net income (loss)	$ (5,497)	$ 11,655	$ 33,354	$ 67,003
Ownership interest (as a percent)	50.00%	50.00%	50.00%	50.00%
Hamilton Essex Development | NERA 50%
Revenues
Rental income	$ 53,928	$ 60,000	$ 173,928	$ 180,000
Total Revenues	53,928	60,000	173,928	180,000
Expenses
Administrative	425	425	1,275	1,314
Depreciation and amortization	707	707	2,122	2,122
Management Fees	2,157	2,400	6,957	7,200
Repairs and Maintenance			3,180	3,150
Taxes and Insurance	14,979	14,062	44,059	44,664
Total Expenses	18,268	17,594	57,593	58,450
Income Before Other Income	35,660	42,406	116,335	121,550
Other Income (loss)
Net Income (Loss)	35,660	42,406	116,335	121,550
Proportionate share of net income (loss)	$ 17,830	$ 21,203	$ 58,167	$ 60,775
Ownership interest (as a percent)	50.00%	50.00%	50.00%	50.00%
345 Franklin
Other Income (loss)
Ownership interest (as a percent)										50.00%
345 Franklin | NERA 50%
Revenues
Rental income	$ 368,508	$ 364,649	$ 1,095,674	$ 1,089,610
Laundry and Sundry Income	1,723	725	3,860	2,823
Total Revenues	370,231	365,374	1,099,534	1,092,433
Expenses
Administrative	7,262	7,071	21,302	23,269
Depreciation and amortization	87,406	86,988	260,841	260,819
Management Fees	16,322	15,033	45,786	45,858
Operating	14,768	16,670	51,188	53,336
Renting	16,918	4,369	29,166	14,910
Repairs and Maintenance	38,542	19,499	89,973	48,832
Taxes and Insurance	31,003	30,006	97,973	94,429
Total Expenses	212,221	179,636	596,229	541,453
Income Before Other Income	158,010	185,738	503,305	550,980
Other Income (loss)
Interest Expense	(97,877)	(99,433)	(295,670)	(298,442)
Total Other Income (Loss)	(97,877)	(99,433)	(295,670)	(298,442)
Net Income (Loss)	60,133	86,305	207,635	252,538
Proportionate share of net income (loss)	$ 30,067	$ 43,153	$ 103,818	$ 126,269
Ownership interest (as a percent)	50.00%	50.00%	50.00%	50.00%
Hamilton 1025
Other Income (loss)
Ownership interest (as a percent)							50.00%
Hamilton 1025 | NERA 50%
Revenues
Rental income	$ 71,380	$ 177,852	$ 308,579	$ 650,328
Total Revenues	71,380	177,852	308,579	650,328
Expenses
Administrative	967	5,684	3,150	8,429
Depreciation and amortization	45,626	58,998	136,877	177,062
Management Fees	2,281	6,293	11,084	24,220
Operating	205	147	305	732
Renting	60		392	1,789
Repairs and Maintenance	62,270	76,499	177,987	232,398
Taxes and Insurance	23,473	35,405	80,038	121,614
Total Expenses	134,882	183,026	409,833	566,244
Income Before Other Income	(63,502)	(5,174)	(101,254)	84,084
Other Income (loss)
Interest Expense	(190)	(10,638)	(967)	(149,327)
Interest Income		1		10
Gain on Sale of Real Estate	848,484	802,129	1,787,816	802,129
Total Other Income (Loss)	848,294	791,492	1,786,849	652,812
Net Income (Loss)	784,792	786,318	1,685,595	736,896
Proportionate share of net income (loss)	$ 392,396	$ 393,159	$ 842,798	$ 368,448
Ownership interest (as a percent)	50.00%	50.00%	50.00%	50.00%
Hamilton Bay Sales | NERA 50%
Revenues
Rental income	$ 1,540	$ 8,625	$ 6,822	$ 36,315
Total Revenues	1,540	8,625	6,822	36,315
Expenses
Administrative	1,558	2,328	3,706	5,312
Depreciation and amortization	80,190	6,292	41,750	18,876
Management Fees	37	336	245	1,412
Operating		58	38	257
Renting			181
Repairs and Maintenance	226	5,187	3,326	18,756
Taxes and Insurance	637	1,300	1,850	8,371
Total Expenses	82,648	15,501	51,096	52,984
Income Before Other Income	(81,108)	(6,876)	(44,274)	(16,669)
Other Income (loss)
Interest Expense		(6)	(2)	(65)
Gain on Sale of Real Estate		99,851	93,392	335,321
Total Other Income (Loss)		99,845	93,390	335,256
Net Income (Loss)	(81,108)	92,969	49,116	318,587
Proportionate share of net income (loss)	$ (40,554)	$ 46,485	$ 24,559	$ 159,294
Ownership interest (as a percent)	50.00%	50.00%	50.00%	50.00%
Hamilton Bay Apts
Other Income (loss)
Ownership interest (as a percent)						50.00%
Hamilton Bay Apts | NERA 50%
Revenues
Rental income	$ 101,378	$ 230,491	$ 499,341	$ 724,848
Total Revenues	101,378	230,491	499,341	724,848
Expenses
Administrative	1,945	2,386	7,142	8,257
Depreciation and amortization	41,157	79,953	243,755	238,807
Management Fees	3,463	8,964	18,332	28,568
Operating	915	356	2,289	1,364
Renting	60	3,400	241	4,354
Repairs and Maintenance	60,661	104,886	253,489	305,491
Taxes and Insurance	30,239	40,318	117,587	124,296
Total Expenses	138,440	240,263	642,835	711,137
Income Before Other Income	(37,062)	(9,772)	(143,494)	13,711
Other Income (loss)
Interest Expense	(135)	(65,351)	(41,876)	(196,329)
Gain on Sale of Real Estate	1,017,221		2,355,141
Total Other Income (Loss)	1,017,086	(65,351)	2,313,265	(196,329)
Net Income (Loss)	980,024	(75,123)	2,169,771	(182,618)
Proportionate share of net income (loss)	$ 490,012	$ (37,562)	$ 1,084,886	$ (91,309)
Ownership interest (as a percent)	50.00%	50.00%	50.00%	50.00%
Hamilton Minuteman
Revenues
Rental income		$ 251,118
Laundry and Sundry Income		44
Total Revenues		251,162
Expenses
Administrative		2,625
Depreciation and amortization		85,288
Management Fees		10,469
Operating		20,614
Renting		819
Repairs and Maintenance		(45,582)
Taxes and Insurance		30,997
Total Expenses		105,230
Income Before Other Income		145,932
Other Income (loss)
Interest Expense		(74,324)
Total Other Income (Loss)		(74,324)
Net Income (Loss)		71,608
Ownership interest (as a percent)								50.00%
Hamilton Minuteman | NERA 50%
Revenues
Rental income	$ 258,529		$ 775,327	$ 742,872
Laundry and Sundry Income	675		1,945	343
Total Revenues	259,204		777,272	743,215
Expenses
Administrative	1,460		3,871	5,225
Depreciation and amortization	87,709		261,519	254,869
Management Fees	9,858		30,327	30,392
Operating	23,816		75,819	66,845
Renting	941		5,044	5,621
Repairs and Maintenance	20,636		59,922	65,358
Taxes and Insurance	32,843		95,737	90,496
Total Expenses	177,263		532,239	518,806
Income Before Other Income	81,941		245,033	224,409
Other Income (loss)
Interest Expense	(59,802)		(177,821)	(226,672)
Total Other Income (Loss)	(59,802)		(177,821)	(226,672)
Net Income (Loss)	22,139		67,212	(2,263)
Proportionate share of net income (loss)	$ 11,070	$ 35,804	$ 33,606	$ (1,132)
Ownership interest (as a percent)	50.00%	50.00%	50.00%	50.00%
Hamilton on Main Apts
Other Income (loss)
Ownership interest (as a percent)									50.00%
Hamilton on Main Apts | NERA 50%
Revenues
Rental income	$ 844,532	$ 820,748	$ 2,499,765	$ 2,425,746
Laundry and Sundry Income	10,069	10,811	28,437	31,445
Total Revenues	854,601	831,559	2,528,202	2,457,191
Expenses
Administrative	8,683	11,545	25,920	31,677
Depreciation and amortization	256,859	241,279	747,077	718,340
Management Fees	33,685	33,611	99,767	97,873
Operating	73,397	81,583	256,589	232,598
Renting	9,764	3,590	31,162	13,106
Repairs and Maintenance	159,062	180,736	486,489	407,989
Taxes and Insurance	109,391	110,147	327,807	365,969
Total Expenses	650,841	662,491	1,974,811	1,867,552
Income Before Other Income	203,760	169,068	553,391	589,639
Other Income (loss)
Interest Expense	(194,143)	(194,071)	(577,041)	(577,942)
Total Other Income (Loss)	(194,143)	(194,071)	(577,041)	(577,942)
Net Income (Loss)	9,617	(25,003)	(23,650)	11,697
Proportionate share of net income (loss)	$ 4,809	$ (12,502)	$ (11,824)	$ 5,849
Ownership interest (as a percent)	50.00%	50.00%	50.00%	50.00%
Dexter Park
Other Income (loss)
Ownership interest (as a percent)					40.00%
Dexter Park | NERA 40%
Revenues
Rental income	$ 3,641,073	$ 3,614,525	$ 11,187,036	$ 11,026,501
Laundry and Sundry Income	20,863	21,478	69,801	76,124
Total Revenues	3,661,936	3,636,003	11,256,837	11,102,625
Expenses
Administrative	46,207	40,757	141,477	137,958
Depreciation and amortization	846,501	817,710	2,515,224	2,435,762
Management Fees	65,484	73,108	240,952	238,441
Operating	254,581	267,793	872,244	876,054
Renting	73,767	137,786	124,525	193,381
Repairs and Maintenance	517,242	520,451	1,108,085	1,113,528
Taxes and Insurance	431,311	402,822	1,290,936	1,136,580
Total Expenses	2,235,093	2,260,427	6,293,443	6,131,704
Income Before Other Income	1,426,843	1,375,576	4,963,394	4,970,921
Other Income (loss)
Interest Expense	(1,201,752)	(1,222,601)	(3,583,723)	(3,657,249)
Total Other Income (Loss)	(1,201,752)	(1,222,601)	(3,583,722)	(3,657,249)
Net Income (Loss)	225,091	152,975	1,379,672	1,313,672
Proportionate share of net income (loss)	$ 90,037	$ 61,189	$ 551,869	$ 525,469
Ownership interest (as a percent)	40.00%	40.00%	40.00%	40.00%