INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Income) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Oct. 28, 2009	Oct. 03, 2005	Mar. 02, 2005	Sep. 30, 2004	Aug. 31, 2004	Nov. 30, 2001
Revenues
Rental income	$ 5,918,704	$ 5,846,090	$ 11,865,056	$ 11,928,889
Laundry and Sundry Income	44,226	39,873	81,860	78,303
Total Revenues	5,962,930	5,885,963	11,946,916	12,007,192
Expenses
Administrative	107,753	69,986	209,319	149,264
Depreciation and amortization	1,455,912	1,500,793	2,884,483	2,990,008
Management Fees	169,769	173,057	329,609	352,138
Operating	449,258	398,192	1,035,337	930,496
Renting	99,537	60,000	145,134	98,717
Repairs and Maintenance	615,611	752,629	1,284,594	1,373,361
Taxes and Insurance	681,764	742,450	1,392,161	1,503,213
Total Expenses	3,579,604	3,697,107	7,280,637	7,397,197
Income Before Other Income	2,383,326	2,188,856	4,666,279	4,609,995
Other Income (loss)
Interest Expense	(1,777,262)	(1,630,225)	(3,386,606)	(3,287,595)
Other Income (Expense)	(3,829,950)		(3,829,950)
Gain on Sale of Real Estate	1,411,960	1,659,885	3,056,723	2,370,644
Total Other Income (Loss)	(4,195,252)	29,660	(4,159,833)	(916,951)
Net Income (Loss)	(1,811,926)	2,218,516	506,446	3,693,044
Proportionate share of net income (loss)	(561,639)	1,058,225	539,262	1,731,062
NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	815,658	854,096	1,683,416	1,269,232
NERA 40%
Other Income (loss)
Proportionate share of net income (loss)	(1,377,297)	204,129	(1,144,154)	461,830
Hamilton Essex 81
Revenues
Rental income	406,813	322,090	818,035	723,284
Laundry and Sundry Income	4,380	4,059	7,385	7,590
Total Revenues	411,193	326,149	825,420	730,874
Expenses
Administrative	3,629	4,729	13,309	9,929
Depreciation and amortization	119,697	113,698	233,982	226,998
Management Fees	15,505	14,598	28,709	31,978
Operating	15,903	16,070	40,034	39,707
Renting	7,760	5,794	11,050	9,516
Repairs and Maintenance	31,680	28,820	86,181	49,551
Taxes and Insurance	62,662	60,634	125,189	121,101
Total Expenses	256,836	244,343	538,454	488,780
Income Before Other Income	154,357	81,806	286,966	242,094
Other Income (loss)
Interest Expense	(108,607)	(85,403)	(207,920)	(164,394)
Total Other Income (Loss)	(108,607)	(85,403)	(207,920)	(164,394)
Net Income (Loss)	45,750	$ (3,597)	79,046	$ 77,700
Ownership interest (as a percent)		50.00%		50.00%
Hamilton Essex 81 | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 22,875	$ (1,799)	$ 39,523	$ 38,851
Ownership interest (as a percent)	50.00%		50.00%
Hamilton Essex Development
Revenues
Rental income	$ 53,928	60,000	$ 107,856	120,000
Total Revenues	53,928	60,000	107,856	120,000
Expenses
Administrative	5,527	425	6,014	850
Depreciation and amortization	664	707	1,329	1,415
Management Fees	2,157	2,400	4,314	4,800
Repairs and Maintenance	3,180	3,180	7,343	3,180
Taxes and Insurance	16,473	14,549	33,196	29,080
Total Expenses	28,001	21,261	52,196	39,325
Income Before Other Income	25,927	38,739	55,660	80,675
Other Income (loss)
Net Income (Loss)	25,927	$ 38,739	55,660	$ 80,675
Ownership interest (as a percent)		50.00%		50.00%
Hamilton Essex Development | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 12,964	$ 19,370	$ 27,830	$ 40,338
Ownership interest (as a percent)	50.00%		50.00%
345 Franklin
Revenues
Rental income	$ 388,256	354,750	$ 792,092	727,167
Laundry and Sundry Income	1,544	1,192	2,761	2,136
Total Revenues	389,800	355,942	794,853	729,303
Expenses
Administrative	6,739	7,649	13,194	14,039
Depreciation and amortization	86,508	87,013	172,759	173,435
Management Fees	16,673	13,506	32,799	29,464
Operating	16,338	13,275	36,919	36,420
Renting	4,720	10,112	5,217	12,248
Repairs and Maintenance	25,415	32,130	46,911	51,430
Taxes and Insurance	30,538	30,253	72,169	66,970
Total Expenses	186,931	193,938	379,968	384,006
Income Before Other Income	202,869	162,004	414,885	345,297
Other Income (loss)
Interest Expense	(96,514)	(98,390)	(193,475)	(197,793)
Total Other Income (Loss)	(96,514)	(98,390)	(193,475)	(197,793)
Net Income (Loss)	106,355	$ 63,614	221,410	$ 147,504
Ownership interest (as a percent)		50.00%		50.00%						50.00%
345 Franklin | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 53,178	$ 31,806	$ 110,705	$ 73,752
Ownership interest (as a percent)	50.00%		50.00%
Hamilton 1025
Revenues
Rental income	$ 32,141	106,802	$ 70,361	237,200
Total Revenues	32,141	106,802	70,361	237,200
Expenses
Administrative	1,071	1,220	2,570	2,184
Depreciation and amortization		45,625		91,251
Management Fees	1,106	4,039	2,614	8,803
Operating	30	138	187	100
Renting	108	270	108	332
Repairs and Maintenance	28,367	60,214	68,574	115,717
Taxes and Insurance	12,696	27,188	30,867	56,565
Total Expenses	43,378	138,694	104,920	274,952
Income Before Other Income	(11,237)	(31,892)	(34,559)	(37,752)
Other Income (loss)
Interest Expense	(21)	(274)	(46)	(777)
Gain on Sale of Real Estate	488,408	228,573	1,305,414	939,332
Total Other Income (Loss)	488,387	228,299	1,305,368	938,555
Net Income (Loss)	477,150	$ 196,407	1,270,809	$ 900,803
Ownership interest (as a percent)		50.00%		50.00%			50.00%
Hamilton 1025 | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 238,575	$ 98,204	$ 635,405	$ 450,401
Ownership interest (as a percent)	50.00%		50.00%
Hamilton Bay Sales
Revenues
Rental income		2,415		5,282
Total Revenues		2,415		5,282
Expenses
Administrative		1,325		2,148
Depreciation and amortization		(39,670)		(38,440)
Management Fees		73		207
Operating		19		38
Renting		119		181
Repairs and Maintenance		1,118		3,100
Taxes and Insurance		351		1,213
Total Expenses		(36,665)		(31,553)
Income Before Other Income		39,080		36,835
Other Income (loss)
Interest Expense				(2)
Gain on Sale of Real Estate		93,392		93,392
Total Other Income (Loss)		93,392		93,390
Net Income (Loss)		$ 132,472		$ 130,225
Ownership interest (as a percent)		50.00%		50.00%
Hamilton Bay Sales | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)		$ 66,236		$ 65,113
Hamilton Bay Apts
Revenues
Rental income	$ 23,240	175,926	$ 45,443	397,962
Total Revenues	23,240	175,926	45,443	397,962
Expenses
Administrative	5,359	2,131	8,425	5,197
Depreciation and amortization	12,000	121,346	22,000	202,598
Management Fees	898	6,219	1,920	14,869
Operating	365	721	1,190	1,374
Renting		119		181
Repairs and Maintenance	23,610	86,223	57,834	192,826
Taxes and Insurance	9,113	41,255	25,572	87,349
Total Expenses	51,345	258,014	116,941	504,394
Income Before Other Income	(28,105)	(82,088)	(71,498)	(106,432)
Other Income (loss)
Interest Expense	(26)	(216)	(75)	(41,741)
Gain on Sale of Real Estate	923,552	1,337,920	1,751,309	1,337,920
Total Other Income (Loss)	923,526	1,337,704	1,751,234	1,296,179
Net Income (Loss)	895,421	$ 1,255,616	1,679,736	$ 1,189,747
Ownership interest (as a percent)		50.00%		50.00%		50.00%
Hamilton Bay Apts | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 447,710	$ 627,807	$ 839,868	$ 594,874
Ownership interest (as a percent)	50.00%		50.00%
Hamilton Minuteman
Revenues
Rental income	$ 264,810	260,009	$ 528,938	516,798
Laundry and Sundry Income		595	(402)	1,270
Total Revenues	264,810	260,604	528,536	518,068
Expenses
Administrative	2,556	1,206	4,380	2,411
Depreciation and amortization	88,121	87,136	175,843	173,810
Management Fees	10,493	9,326	20,861	20,466
Operating	26,525	24,128	60,375	52,003
Renting	931	2,783	4,308	4,104
Repairs and Maintenance	25,807	18,432	45,424	39,286
Taxes and Insurance	31,604	31,450	62,650	62,894
Total Expenses	186,037	174,461	373,841	354,974
Income Before Other Income	78,773	86,143	154,695	163,094
Other Income (loss)
Interest Expense	(58,889)	(58,928)	(117,409)	(118,019)
Total Other Income (Loss)	(58,889)	(58,928)	(117,409)	(118,019)
Net Income (Loss)	19,884	$ 27,215	37,286	$ 45,075
Ownership interest (as a percent)		50.00%		50.00%				50.00%
Hamilton Minuteman | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 9,942	$ 13,608	$ 18,643	$ 22,538
Ownership interest (as a percent)	50.00%		50.00%
Hamilton on Main Apts
Revenues
Rental income	$ 883,327	828,931	$ 1,741,539	1,655,234
Laundry and Sundry Income	9,905	9,421	19,031	18,368
Total Revenues	893,232	838,352	1,760,570	1,673,602
Expenses
Administrative	14,063	6,219	27,189	17,237
Depreciation and amortization	257,444	247,902	512,950	490,218
Management Fees	33,609	31,979	66,052	66,082
Operating	82,889	79,032	203,282	183,191
Renting	5,858	11,372	14,509	21,398
Repairs and Maintenance	143,666	163,301	326,040	327,427
Taxes and Insurance	103,474	108,603	208,025	218,416
Total Expenses	641,003	648,408	1,358,047	1,323,969
Income Before Other Income	252,229	189,944	402,523	349,633
Other Income (loss)
Interest Expense	(191,400)	(192,214)	(379,639)	(382,898)
Total Other Income (Loss)	(191,400)	(192,214)	(379,639)	(382,898)
Net Income (Loss)	60,829	$ (2,270)	22,884	$ (33,265)
Ownership interest (as a percent)		50.00%		50.00%					50.00%
Hamilton on Main Apts | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 30,415	$ (1,135)	$ 11,442	$ (16,633)
Ownership interest (as a percent)	50.00%		50.00%
Dexter Park
Revenues
Rental income	$ 3,866,189	3,735,167	$ 7,760,792	7,545,962
Laundry and Sundry Income	28,397	24,606	53,085	48,939
Total Revenues	3,894,586	3,759,773	7,813,877	7,594,901
Expenses
Administrative	68,809	45,082	134,238	95,269
Depreciation and amortization	891,478	837,036	1,765,620	1,668,723
Management Fees	89,328	90,917	172,340	175,469
Operating	307,208	264,809	693,350	617,663
Renting	80,160	29,431	109,942	50,757
Repairs and Maintenance	333,886	359,211	646,287	590,844
Taxes and Insurance	415,204	428,167	834,493	859,625
Total Expenses	2,186,073	2,054,653	4,356,270	4,058,350
Income Before Other Income	1,708,513	1,705,120	3,457,607	3,536,551
Other Income (loss)
Interest Expense	(1,321,805)	(1,194,800)	(2,488,042)	(2,381,971)
Other Income (Expense)	(3,829,950)		(3,829,950)
Total Other Income (Loss)	(5,151,755)	(1,194,800)	(6,317,992)	(2,381,971)
Net Income (Loss)	(3,443,243)	$ 510,320	(2,860,385)	$ 1,154,580
Ownership interest (as a percent)		40.00%		40.00%	40.00%
Dexter Park | NERA 40%
Other Income (loss)
Proportionate share of net income (loss)	$ (1,377,297)	$ 204,129	$ (1,144,154)	$ 461,830
Ownership interest (as a percent)	40.00%		40.00%