INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Income) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Oct. 28, 2009	Oct. 03, 2005	Mar. 02, 2005	Sep. 30, 2004	Aug. 31, 2004	Nov. 30, 2001
NERA 50%
Other Income (loss)
Ownership interest (as a percent)	50.00%		50.00%
NERA 40%
Other Income (loss)
Ownership interest (as a percent)	40.00%		40.00%
Investment Properties
Revenues
Rental income	$ 6,038,075	$ 6,097,079	$ 12,389,532	$ 12,170,173
Laundry and Sundry Income	32,667	38,001	70,997	78,389
Total Revenues	6,070,742	6,135,080	12,460,529	12,248,562
Expenses
Administrative	79,862	85,144	169,962	180,167
Depreciation and amortization	1,484,331	1,471,070	2,961,219	2,937,666
Management Fees	150,347	163,373	321,175	326,989
Operating	368,244	363,687	833,252	921,175
Renting	26,161	66,466	65,212	111,123
Repairs and Maintenance	416,490	620,035	897,819	1,112,141
Taxes and Insurance	832,830	771,892	1,691,854	1,557,303
Total Expenses	3,358,265	3,541,667	6,940,493	7,146,564
Income Before Other Income	2,712,477	2,593,413	5,520,036	5,101,998
Other Income (loss)
Interest Expense	(1,682,669)	(1,735,366)	(3,396,574)	(3,466,987)
Interest Income		305,320
Gain on Sale of Real Estate				738,983
Total Other Income (Loss)	(1,682,669)	(1,430,046)	(3,396,574)	(2,728,004)
Net Income (Loss)	1,029,808	1,163,367	2,123,462	2,373,994
Proportionate share of net income (loss)	444,115	513,406	918,678	1,062,345
Investment Properties | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	160,953	240,292	346,476	563,715
Investment Properties | NERA 40%
Other Income (loss)
Proportionate share of net income (loss)	283,162	273,114	572,202	498,630
Hamilton Essex 81
Revenues
Rental income	380,708	450,538	820,088	910,111
Laundry and Sundry Income	3,298	3,865	6,683	6,870
Total Revenues	384,006	454,403	826,771	916,981
Expenses
Administrative	5,293	9,876	11,480	15,255
Depreciation and amortization	121,927	119,887	243,569	239,432
Management Fees	10,316	17,021	28,052	34,227
Operating	20,776	15,594	46,299	37,045
Renting	629	5,187	3,404	8,517
Repairs and Maintenance	40,200	26,786	67,209	64,670
Taxes and Insurance	64,724	61,476	129,401	123,306
Total Expenses	263,865	255,827	529,414	522,452
Income Before Other Income	120,141	198,576	297,357	394,529
Other Income (loss)
Interest Expense	(71,358)	(122,015)	(172,091)	(243,020)
Total Other Income (Loss)	(71,358)	(122,015)	(172,091)	(243,020)
Net Income (Loss)	48,783	$ 76,561	125,266	$ 151,509
Ownership interest (as a percent)		50.00%		50.00%
Hamilton Essex 81 | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 24,392	$ 38,281	$ 62,632	$ 75,755
Ownership interest (as a percent)	50.00%		50.00%
Hamilton Essex Development
Revenues
Rental income	$ 5,391	25,951	$ 65,862	101,241
Total Revenues	5,391	25,951	65,862	101,241
Expenses
Administrative	1,550	7,582	2,200	9,674
Depreciation and amortization	5,075	5,075	10,149	10,149
Management Fees		2,160	2,203	4,320
Operating				8
Repairs and Maintenance	3,046	3,180	3,046	3,180
Taxes and Insurance	15,238	15,183	30,457	30,860
Total Expenses	24,909	33,180	48,055	58,191
Income Before Other Income	(19,518)	(7,229)	17,807	43,050
Other Income (loss)
Net Income (Loss)	(19,518)	$ (7,229)	17,807	$ 43,050
Ownership interest (as a percent)		50.00%		50.00%
Hamilton Essex Development | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ (9,758)	$ (3,614)	$ 8,903	$ 21,525
Ownership interest (as a percent)	50.00%		50.00%
345 Franklin
Revenues
Rental income	$ 419,342	417,850	$ 847,492	803,093
Laundry and Sundry Income	171	(805)	625	584
Total Revenues	419,513	417,045	848,117	803,677
Expenses
Administrative	8,572	4,653	16,328	10,043
Depreciation and amortization	84,541	86,226	169,036	172,453
Management Fees	15,829	16,387	32,296	30,443
Operating	15,776	17,921	28,764	40,524
Renting	929	8,473	9,682	11,993
Repairs and Maintenance	21,797	23,810	43,375	42,277
Taxes and Insurance	39,808	35,369	79,714	75,609
Total Expenses	187,252	192,839	379,195	383,342
Income Before Other Income	232,261	224,206	468,922	420,335
Other Income (loss)
Interest Expense	(92,983)	(94,834)	(186,408)	(189,082)
Total Other Income (Loss)	(92,983)	(94,834)	(186,408)	(189,082)
Net Income (Loss)	139,278	$ 129,372	282,514	$ 231,253
Ownership interest (as a percent)		50.00%		50.00%						50.00%
345 Franklin | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 69,639	$ 64,686	$ 141,257	$ 115,627
Ownership interest (as a percent)	50.00%		50.00%
Hamilton 1025
Revenues
Rental income	$ 20,558	23,466	$ 41,117	47,061
Total Revenues	20,558	23,466	41,117	47,061
Expenses
Administrative	931	2,708	11,056	4,402
Depreciation and amortization	816	3,195	1,632	6,391
Management Fees	822	934	1,645	1,899
Operating	51	88	96	862
Repairs and Maintenance		20,359		28,399
Taxes and Insurance	4,492	7,096	8,680	14,445
Total Expenses	7,112	34,380	23,109	56,398
Income Before Other Income	13,446	(10,914)	18,008	(9,337)
Other Income (loss)
Interest Income		305,320
Gain on Sale of Real Estate				306,075
Total Other Income (Loss)		305,320		306,075
Net Income (Loss)	13,446	$ 294,406	18,008	$ 296,738
Ownership interest (as a percent)		50.00%		50.00%			50.00%
Hamilton 1025 | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 6,723	$ 147,203	$ 9,004	$ 148,369
Ownership interest (as a percent)	50.00%		50.00%
Hamilton Bay Apts
Revenues
Rental income				3,629
Total Revenues				3,629
Expenses
Administrative		841		4,214
Depreciation and amortization				5,420
Management Fees				145
Operating		37
Repairs and Maintenance				10,266
Taxes and Insurance		300		5,206
Total Expenses		1,178		25,251
Income Before Other Income		(1,178)		(21,622)
Other Income (loss)
Interest Expense				(6)
Gain on Sale of Real Estate				432,908
Total Other Income (Loss)				432,902
Net Income (Loss)		$ (1,178)		$ 411,280
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)		$ (589)		$ 205,641
Hamilton Minuteman
Revenues
Rental income	$ 290,517	281,232	$ 581,210	556,069
Laundry and Sundry Income	626	228	626	2,135
Total Revenues	291,143	281,460	581,836	558,204
Expenses
Administrative	4,168	2,034	6,650	5,750
Depreciation and amortization	86,954	88,906	173,780	177,501
Management Fees	11,472	11,232	23,004	22,299
Operating	28,428	27,824	50,654	51,579
Renting	2,750	542	5,750	2,574
Repairs and Maintenance	28,056	45,649	38,950	82,321
Taxes and Insurance	36,125	32,518	72,176	64,769
Total Expenses	197,953	208,705	370,964	406,793
Income Before Other Income	93,190	72,755	210,872	151,411
Other Income (loss)
Interest Expense	(59,242)	(58,613)	(118,502)	(116,605)
Total Other Income (Loss)	(59,242)	(58,613)	(118,502)	(116,605)
Net Income (Loss)	33,948	$ 14,142	92,370	$ 34,806
Ownership interest (as a percent)		50.00%		50.00%				50.00%
Hamilton Minuteman | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 16,974	$ 7,071	$ 46,185	$ 17,403
Ownership interest (as a percent)	50.00%		50.00%
Hamilton on Main Apts
Revenues
Rental income	$ 897,613	865,335	$ 1,803,314	1,688,003
Laundry and Sundry Income	8,606	10,018	17,355	20,080
Total Revenues	906,219	875,353	1,820,669	1,708,083
Expenses
Administrative	13,627	17,065	29,475	34,912
Depreciation and amortization	263,086	260,668	524,133	519,106
Management Fees	32,745	33,135	67,729	65,003
Operating	83,750	84,527	177,595	191,817
Renting	7,773	17,378	15,493	33,490
Repairs and Maintenance	99,155	192,894	233,991	317,086
Taxes and Insurance	109,712	102,907	232,474	207,339
Total Expenses	609,848	708,574	1,280,890	1,368,753
Income Before Other Income	296,371	166,779	539,779	339,330
Other Income (loss)
Interest Expense	(190,404)	(192,271)	(382,787)	(380,539)
Total Other Income (Loss)	(190,404)	(192,271)	(382,787)	(380,539)
Net Income (Loss)	105,967	$ (25,492)	156,992	$ (41,209)
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)	$ 52,984	$ (12,746)	$ 78,495	$ (20,605)
Ownership interest (as a percent)	50.00%		50.00%
Dexter Park
Revenues
Rental income	$ 4,023,946	4,032,707	$ 8,230,449	8,060,966
Laundry and Sundry Income	19,966	24,695	45,708	48,720
Total Revenues	4,043,912	4,057,402	8,276,157	8,109,686
Expenses
Administrative	45,721	40,385	92,773	95,917
Depreciation and amortization	921,932	907,113	1,838,920	1,807,214
Management Fees	79,163	82,504	166,246	168,653
Operating	219,463	217,696	529,844	599,340
Renting	14,080	34,886	30,883	54,549
Repairs and Maintenance	224,236	307,357	511,248	563,942
Taxes and Insurance	562,731	517,043	1,138,952	1,035,769
Total Expenses	2,067,326	2,106,984	4,308,866	4,325,384
Income Before Other Income	1,976,586	1,950,418	3,967,291	3,784,302
Other Income (loss)
Interest Expense	(1,268,682)	(1,267,633)	(2,536,786)	(2,537,735)
Total Other Income (Loss)	(1,268,682)	(1,267,633)	(2,536,786)	(2,537,735)
Net Income (Loss)	$ 707,904	$ 682,784	$ 1,430,505	$ 1,246,567
Ownership interest (as a percent)		40.00%		40.00%	40.00%
Dexter Park | NERA 50%
Other Income (loss)
Ownership interest (as a percent)	40.00%		40.00%
Dexter Park | NERA 40%
Other Income (loss)
Proportionate share of net income (loss)	$ 283,162	$ 273,114	$ 572,202	$ 498,630