INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Income) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Oct. 28, 2009	Oct. 03, 2005	Mar. 02, 2005	Sep. 30, 2004	Aug. 31, 2004	Nov. 30, 2001
Revenues
Rental income									$ 62,175,592	$ 61,661,551	$ 60,012,174
Laundry and sundry income									462,862	441,159	465,140
Total Revenues	$ 16,155,649	$ 15,946,672	$ 15,447,344	$ 15,088,789	$ 14,825,754	$ 15,142,266	$ 15,759,106	$ 16,375,584	62,638,454	62,102,710	60,477,314
Expenses
Administrative									2,476,593	2,209,780	2,495,272
Depreciation and amortization									16,671,076	18,410,811	14,684,248
Management fee									2,523,943	2,452,814	2,409,151
Operating									6,471,250	5,766,160	5,682,264
Renting									1,241,298	864,542	953,043
Repairs and maintenance									10,069,325	8,781,789	9,191,561
Taxes and insurance									8,942,469	8,647,781	7,790,008
Total Expenses									48,395,954	47,133,677	43,205,547
Income Before Other Income (Expense)	3,108,893	3,551,236	4,187,232	3,395,139	2,952,494	3,227,636	4,444,469	4,344,434	14,242,500	14,969,033	17,271,767
Other Income (Expense)
Interest expense									(13,629,463)	(13,705,415)	(12,201,966)
Interest income									87	195	607
Total Other Income (Expense)	(6,009,382)	(3,626,621)	(3,617,341)	(3,689,319)	(3,922,516)	(3,666,920)	(2,979,418)	(2,975,651)	(16,942,663)	(13,544,505)	(10,724,515)
Net (Loss) Income	$ (2,900,489)	$ (75,385)	$ 569,891	$ (294,180)	$ (970,022)	$ (439,284)	$ 1,465,051	$ 1,368,783	$ (2,700,163)	$ 1,424,528	$ 6,547,252
NERA 50%
Other Income (Expense)
Ownership interest (as a percent)	50.00%				50.00%				50.00%	50.00%	50.00%
NERA 40%
Other Income (Expense)
Ownership interest (as a percent)	40.00%				40.00%				40.00%	40.00%	40.00%
Investment Properties
Revenues
Rental income									$ 20,837,208	$ 21,776,809	$ 24,648,947
Laundry and sundry income									154,646	129,713	165,096
Total Revenues									20,991,854	21,906,522	24,814,043
Expenses
Administrative									403,509	327,697	377,298
Depreciation and amortization									6,016,613	5,956,370	5,903,401
Management fee									575,162	580,029	664,341
Operating									1,781,069	1,633,551	1,791,071
Renting									711,979	466,296	495,103
Repairs and maintenance									2,849,104	2,441,880	2,511,741
Taxes and insurance									3,539,050	3,383,874	3,074,653
Total Expenses									15,876,486	14,789,697	14,817,608
Income Before Other Income (Expense)									5,115,368	7,116,825	9,996,435
Other Income (Expense)
Interest expense									(6,658,595)	(6,742,727)	(6,915,193)
Interest income									1,222
Gain on sale of real estate											734,635
Total Other Income (Expense)									(6,657,373)	(6,742,727)	(6,180,558)
Net (Loss) Income									(1,542,005)	374,098	3,815,877
Proportionate share of net income (loss)									(567,308)	160,715	1,678,554
Investment Properties | NERA 50%
Other Income (Expense)
Proportionate share of net income (loss)									247,478	55,380	761,014
Investment Properties | NERA 40%
Other Income (Expense)
Proportionate share of net income (loss)									(814,786)	105,335	917,540
Hamilton Essex 81
Revenues
Rental income									1,609,397	874,212	1,743,610
Laundry and sundry income									12,761	12,495	14,350
Total Revenues									1,622,158	886,707	1,757,960
Expenses
Administrative									76,338	20,296	29,307
Depreciation and amortization									479,512	488,315	483,748
Management fee									52,617	42,958	69,039
Operating									168,160	79,195	89,002
Renting									101,328	22,782	43,534
Repairs and maintenance									159,593	128,728	152,930
Taxes and insurance									261,145	256,162	245,086
Total Expenses									1,298,693	1,038,436	1,112,646
Income Before Other Income (Expense)									323,465	(151,729)	645,314
Other Income (Expense)
Interest expense									(246,339)	(299,161)	(466,737)
Total Other Income (Expense)									(246,339)	(299,161)	(466,737)
Net (Loss) Income									$ 77,126	$ (450,890)	$ 178,577
Ownership interest (as a percent)	50.00%				50.00%				50.00%	50.00%	50.00%
Hamilton Essex 81 | NERA 50%
Other Income (Expense)
Proportionate share of net income (loss)									$ 38,563	$ (225,446)	$ 89,289
Hamilton Essex Development
Revenues
Rental income									391,878	19,848	222,183
Total Revenues									391,878	19,848	222,183
Expenses
Administrative									2,875	4,026	25,369
Depreciation and amortization									20,298	20,297	20,297
Management fee									12,922	2,203	8,683
Operating											8
Repairs and maintenance									520	3,180	3,180
Taxes and insurance									60,764	61,612	61,493
Total Expenses									97,379	91,318	119,030
Income Before Other Income (Expense)									294,499	(71,470)	103,153
Other Income (Expense)
Net (Loss) Income									$ 294,499	$ (71,470)	$ 103,153
Ownership interest (as a percent)	50.00%				50.00%				50.00%	50.00%	50.00%
Hamilton Essex Development | NERA 50%
Other Income (Expense)
Proportionate share of net income (loss)									$ 147,249	$ (35,735)	$ 51,577
345 Franklin
Revenues
Rental income									1,360,472	1,516,648	1,613,295
Laundry and sundry income									1,494	604	2,844
Total Revenues									1,361,966	1,517,252	1,616,139
Expenses
Administrative									31,566	36,431	24,610
Depreciation and amortization									343,834	339,513	345,282
Management fee									54,178	57,986	62,486
Operating									58,667	67,885	80,581
Renting									54,672	52,571	36,918
Repairs and maintenance									129,548	138,991	125,474
Taxes and insurance									175,183	167,456	154,731
Total Expenses									847,648	860,833	830,082
Income Before Other Income (Expense)									514,318	656,419	786,057
Other Income (Expense)
Interest expense									(359,036)	(369,742)	(377,448)
Total Other Income (Expense)									(359,036)	(369,742)	(377,448)
Net (Loss) Income									$ 155,282	$ 286,677	$ 408,609
Ownership interest (as a percent)	50.00%				50.00%				50.00%	50.00%	50.00%						50.00%
345 Franklin | NERA 50%
Other Income (Expense)
Proportionate share of net income (loss)									$ 77,641	$ 143,339	$ 204,305
Hamilton 1025
Revenues
Rental income									98,135	96,223	93,116
Total Revenues									98,135	96,223	93,116
Expenses
Administrative									2,812	12,995	7,497
Depreciation and amortization									3,264	3,264	7,655
Management fee									3,801	3,529	3,556
Operating									334	276	974
Renting											64
Repairs and maintenance											28,399
Taxes and insurance									19,467	17,416	22,213
Total Expenses									29,678	37,480	70,358
Income Before Other Income (Expense)									68,457	58,743	22,758
Other Income (Expense)
Gain on sale of real estate											306,075
Total Other Income (Expense)											306,075
Net (Loss) Income									$ 68,457	$ 58,744	$ 328,834
Ownership interest (as a percent)	50.00%				50.00%				50.00%	50.00%	50.00%			50.00%
Hamilton 1025 | NERA 50%
Other Income (Expense)
Proportionate share of net income (loss)									$ 34,229	$ 29,372	$ 164,417
Hamilton Bay Apts
Revenues
Rental income											3,541
Total Revenues											3,541
Expenses
Administrative											6,147
Management fee											145
Repairs and maintenance											10,266
Taxes and insurance											5,206
Total Expenses											21,764
Income Before Other Income (Expense)											(18,223)
Other Income (Expense)
Gain on sale of real estate											428,560
Total Other Income (Expense)											428,560
Net (Loss) Income											410,337
Ownership interest (as a percent)													50.00%
Hamilton Bay Apts | NERA 50%
Other Income (Expense)
Proportionate share of net income (loss)											205,169
Hamilton Minuteman
Revenues
Rental income									1,139,865	1,165,027	1,136,912
Laundry and sundry income									3,913	2,951	6,033
Total Revenues									1,143,778	1,167,978	1,142,945
Expenses
Administrative									16,450	13,603	7,722
Depreciation and amortization									338,362	348,994	357,932
Management fee									45,541	46,275	45,624
Operating									98,115	102,397	83,872
Renting									4,419	7,994	5,324
Repairs and maintenance									120,626	95,185	133,812
Taxes and insurance									144,533	144,664	131,821
Total Expenses									768,046	759,112	766,107
Income Before Other Income (Expense)									375,732	408,866	376,838
Other Income (Expense)
Interest expense									(237,845)	(238,233)	(235,883)
Total Other Income (Expense)									(237,845)	(238,233)	(235,883)
Net (Loss) Income									$ 137,887	$ 170,633	$ 140,954
Ownership interest (as a percent)	50.00%				50.00%				50.00%	50.00%	50.00%				50.00%
Hamilton Minuteman | NERA 50%
Other Income (Expense)
Proportionate share of net income (loss)									$ 68,944	$ 85,317	$ 70,477
Hamilton on Main Apts
Revenues
Rental income									3,370,478	3,497,639	3,429,864
Laundry and sundry income									38,697	35,302	41,174
Total Revenues									3,409,175	3,532,941	3,471,038
Expenses
Administrative									68,008	59,014	68,877
Depreciation and amortization									1,089,225	1,059,165	1,046,022
Management fee									131,221	132,513	132,195
Operating									432,061	362,318	398,286
Renting									90,842	73,837	47,817
Repairs and maintenance									624,475	513,642	651,948
Taxes and insurance									451,937	449,692	404,805
Total Expenses									2,887,769	2,650,181	2,749,950
Income Before Other Income (Expense)									521,406	882,760	721,088
Other Income (Expense)
Interest expense									(759,698)	(765,692)	(769,526)
Total Other Income (Expense)									(759,698)	(765,692)	(769,526)
Net (Loss) Income									$ (238,292)	$ 117,068	$ (48,438)
Ownership interest (as a percent)	50.00%				50.00%				50.00%	50.00%	50.00%					50.00%
Hamilton on Main Apts | NERA 50%
Other Income (Expense)
Proportionate share of net income (loss)									$ (119,147)	$ 58,534	$ (24,219)
Dexter Park
Revenues
Rental income									12,866,983	14,607,212	16,406,426
Laundry and sundry income									97,781	78,361	100,695
Total Revenues									12,964,764	14,685,573	16,507,121
Expenses
Administrative									205,460	181,332	207,769
Depreciation and amortization									3,742,118	3,696,822	3,642,465
Management fee									274,882	294,565	342,613
Operating									1,023,732	1,021,480	1,138,348
Renting									460,718	309,112	361,446
Repairs and maintenance									1,814,342	1,562,154	1,405,732
Taxes and insurance									2,426,021	2,286,872	2,049,298
Total Expenses									9,947,273	9,352,337	9,147,671
Income Before Other Income (Expense)									3,017,491	5,333,236	7,359,450
Other Income (Expense)
Interest expense									(5,055,677)	(5,069,899)	(5,065,599)
Interest income									1,222
Total Other Income (Expense)									(5,054,455)	(5,069,899)	(5,065,599)
Net (Loss) Income									$ (2,036,964)	$ 263,337	$ 2,293,853
Ownership interest (as a percent)	40.00%				40.00%				40.00%	40.00%	40.00%	40.00%
Dexter Park | NERA 40%
Other Income (Expense)
Proportionate share of net income (loss)									$ (814,786)	$ 105,335	$ 917,540