INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Income) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Oct. 28, 2009	Mar. 02, 2005	Sep. 30, 2004	Aug. 31, 2004	Nov. 30, 2001
Revenues
Rental income	$ 14,980,116	$ 16,253,430
Laundry and sundry income	108,673	122,154
Total Revenues	15,088,789	16,375,584
Expenses
Administrative	652,186	584,658
Depreciation and amortization	3,905,918	4,565,467
Management fee	605,391	648,993
Operating	2,045,968	1,668,402
Renting	261,966	196,871
Repairs and maintenance	1,970,087	2,086,218
Taxes and insurance	2,252,134	2,280,541
Total Expenses	11,693,650	12,031,150
Income Before Other Income (Expense)	3,395,139	4,344,434
Other Income (Expense)
Interest expense	(3,364,170)	(3,450,325)
Interest income	21	107
Total Other Income (Expense)	(3,689,319)	(2,975,651)
Net Inocme (Loss)	$ (294,180)	$ 1,368,783
NERA 50%
Other Income (Expense)
Ownership interest (as a percent)	50.00%	50.00%
NERA 40%
Other Income (Expense)
Ownership interest (as a percent)	40.00%	40.00%
Investment Properties
Revenues
Rental income	$ 4,758,898	$ 6,351,455
Laundry and sundry income	39,330	38,330
Total Revenues	4,798,228	6,389,785
Expenses
Administrative	91,579	90,101
Depreciation and amortization	1,488,677	1,476,886
Management fee	127,249	170,825
Operating	500,667	465,009
Renting	163,187	39,052
Repairs and maintenance	670,571	481,331
Taxes and insurance	871,787	859,024
Total Expenses	3,913,717	3,582,228
Income Before Other Income (Expense)	884,511	2,807,557
Other Income (Expense)
Interest expense	(1,662,666)	(1,713,904)
Total Other Income (Expense)	(1,662,666)	(1,713,904)
Net Inocme (Loss)	(778,155)	1,093,653
Proportionate share of net income (loss)	(325,170)	474,567
Investment Properties | NERA 50%
Other Income (Expense)
Net Inocme (Loss)		185,525
Proportionate share of net income (loss)	(69,534)
Investment Properties | NERA 40%
Other Income (Expense)
Net Inocme (Loss)		289,042
Proportionate share of net income (loss)	(255,636)
Hamilton Essex 81
Revenues
Rental income	230,217	439,380
Laundry and sundry income	3,013	3,385
Total Revenues	233,230	442,765
Expenses
Administrative	14,556	6,188
Depreciation and amortization	118,942	121,642
Management fee	5,260	17,736
Operating	29,432	25,524
Renting	32,784	2,775
Repairs and maintenance	52,547	27,009
Taxes and insurance	65,539	64,677
Total Expenses	319,060	265,551
Income Before Other Income (Expense)	(85,830)	177,214
Other Income (Expense)
Interest expense	(61,312)	(100,733)
Total Other Income (Expense)	(61,312)	(100,733)
Net Inocme (Loss)	(147,142)	$ 76,481
Ownership interest (as a percent)		50.00%
Hamilton Essex 81 | NERA 50%
Other Income (Expense)
Net Inocme (Loss)		$ 38,241
Proportionate share of net income (loss)	$ (73,571)
Ownership interest (as a percent)	50.00%
Hamilton Essex Development
Revenues
Rental income		60,471
Total Revenues		60,471
Expenses
Administrative	$ 853	650
Depreciation and amortization	5,074	5,074
Management fee		2,203
Taxes and insurance	14,885	15,218
Total Expenses	20,812	23,145
Income Before Other Income (Expense)	(20,812)	37,326
Other Income (Expense)
Net Inocme (Loss)	(20,812)	$ 37,326
Ownership interest (as a percent)		50.00%
Hamilton Essex Development | NERA 50%
Other Income (Expense)
Net Inocme (Loss)		$ 18,663
Proportionate share of net income (loss)	$ (10,406)
Ownership interest (as a percent)	50.00%
345 Franklin
Revenues
Rental income	$ 333,093	428,150
Laundry and sundry income	112	454
Total Revenues	333,205	428,604
Expenses
Administrative	4,803	7,757
Depreciation and amortization	85,345	84,494
Management fee	12,412	16,466
Operating	13,521	12,988
Renting	14,328	8,753
Repairs and maintenance	23,278	21,578
Taxes and insurance	43,670	39,906
Total Expenses	197,357	191,942
Income Before Other Income (Expense)	135,848	236,662
Other Income (Expense)
Interest expense	(90,643)	(93,426)
Total Other Income (Expense)	(90,643)	(93,426)
Net Inocme (Loss)	45,205	$ 143,236
Ownership interest (as a percent)		50.00%					50.00%
345 Franklin | NERA 50%
Other Income (Expense)
Net Inocme (Loss)		$ 71,618
Proportionate share of net income (loss)	$ 22,602
Ownership interest (as a percent)	50.00%
Hamilton 1025
Revenues
Rental income	$ 24,369	20,558
Total Revenues	24,369	20,558
Expenses
Administrative	714	10,125
Depreciation and amortization	816	816
Management fee	628	822
Operating	91	45
Taxes and insurance	4,797	4,189
Total Expenses	7,046	15,997
Income Before Other Income (Expense)	17,323	4,561
Other Income (Expense)
Net Inocme (Loss)	17,323	$ 4,561
Ownership interest (as a percent)		50.00%		50.00%
Hamilton 1025 | NERA 50%
Other Income (Expense)
Net Inocme (Loss)		$ 2,281
Proportionate share of net income (loss)	$ 8,662
Ownership interest (as a percent)	50.00%
Hamilton Minuteman
Revenues
Rental income	$ 284,524	290,693
Laundry and sundry income	1,276
Total Revenues	285,800	290,693
Expenses
Administrative	3,583	2,481
Depreciation and amortization	84,025	86,826
Management fee	11,296	11,532
Operating	34,596	22,226
Renting	360	3,000
Repairs and maintenance	19,405	10,895
Taxes and insurance	34,976	36,051
Total Expenses	188,241	173,011
Income Before Other Income (Expense)	97,559	117,682
Other Income (Expense)
Interest expense	(58,625)	(59,259)
Total Other Income (Expense)	(58,625)	(59,259)
Net Inocme (Loss)	38,934	$ 58,423
Ownership interest (as a percent)		50.00%			50.00%
Hamilton Minuteman | NERA 50%
Other Income (Expense)
Net Inocme (Loss)		$ 29,211
Proportionate share of net income (loss)	$ 19,466
Ownership interest (as a percent)	50.00%
Hamilton on Main Apts
Revenues
Rental income	$ 816,812	905,700
Laundry and sundry income	8,777	8,749
Total Revenues	825,589	914,449
Expenses
Administrative	20,219	15,848
Depreciation and amortization	269,915	261,047
Management fee	32,375	34,984
Operating	124,933	93,845
Renting	30,760	7,720
Repairs and maintenance	122,446	134,837
Taxes and insurance	110,134	122,762
Total Expenses	710,782	671,043
Income Before Other Income (Expense)	114,807	243,406
Other Income (Expense)
Interest expense	(187,378)	(192,382)
Total Other Income (Expense)	(187,378)	(192,382)
Net Inocme (Loss)	(72,571)	$ 51,024
Ownership interest (as a percent)		50.00%				50.00%
Hamilton on Main Apts | NERA 50%
Other Income (Expense)
Net Inocme (Loss)		$ 25,512
Proportionate share of net income (loss)	$ (36,286)
Ownership interest (as a percent)	50.00%
Dexter Park
Revenues
Rental income	$ 3,069,883	4,206,503
Laundry and sundry income	26,152	25,742
Total Revenues	3,096,035	4,232,245
Expenses
Administrative	46,851	47,052
Depreciation and amortization	924,560	916,987
Management fee	65,278	87,082
Operating	298,094	310,381
Renting	84,955	16,804
Repairs and maintenance	452,895	287,012
Taxes and insurance	597,786	576,221
Total Expenses	2,470,419	2,241,539
Income Before Other Income (Expense)	625,616	1,990,706
Other Income (Expense)
Interest expense	(1,264,708)	(1,268,104)
Total Other Income (Expense)	(1,264,708)	(1,268,104)
Net Inocme (Loss)	(639,092)	$ 722,602
Ownership interest (as a percent)		40.00%	40.00%
Dexter Park | NERA 40%
Other Income (Expense)
Net Inocme (Loss)		$ 289,042
Proportionate share of net income (loss)	$ (255,636)
Ownership interest (as a percent)	40.00%