INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Balance Sheet) (Details)	Mar. 31, 2024 USD ($) property	Dec. 31, 2023 USD ($)	Mar. 31, 2023 USD ($) property	Dec. 31, 2022 USD ($)	May 31, 2018 USD ($)	Oct. 28, 2009 item	Mar. 07, 2005 item	Mar. 02, 2005 item
ASSETS
Rental Properties	$ 270,256,700	$ 269,804,946
Cash & Cash Equivalents	28,801,744	18,230,463
Rent Receivable	865,990	953,761
Real Estate Tax Escrows	2,332,010	2,229,703
Prepaid Expenses & Other Assets	8,073,622	8,369,775
Total Assets	381,191,994	385,730,690
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	408,060,293	408,660,292
Accounts Payable & Accrued Expense	5,416,975	5,720,088
Advance Rental Pmts & Security Deposits	9,936,175	9,996,887
Total Liabilities	450,233,094	451,085,074
Partners' Capital	(69,041,100)	(65,354,384)	$ (64,929,774)	$ (59,869,357)
Total Liabilities and Partners' Capital	381,191,994	385,730,690
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	(26,819,651)	$ (26,707,807)
Investment Properties
ASSETS
Rental Properties	101,618,965		106,016,382
Cash & Cash Equivalents	5,474,638		7,153,454
Rent Receivable	394,572		386,060
Real Estate Tax Escrows	348,766		307,517
Prepaid Expenses & Other Assets	3,144,925		2,942,597
Total Assets	110,981,866		116,806,010
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	165,937,703		166,061,429
Accounts Payable & Accrued Expense	1,487,645		3,758,728
Advance Rental Pmts & Security Deposits	4,602,710		4,275,882
Total Liabilities	172,028,058		174,096,039
Partners' Capital	(61,046,192)		(57,290,029)
Total Liabilities and Partners' Capital	110,981,866		116,806,010
Investment in Unconsolidated Joint Ventures	1,416,930		1,436,252
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	(26,819,651)		(25,244,289)
Total Investment in Unconsolidated Joint Ventures (Net)	$ (25,402,721)		$ (23,808,037)
Total units/ condominiums
Total | property	690		690
Investment Properties | Residential buildings
Total units/ condominiums
Total | property	687		687
Investment Properties | Commercial
Total units/ condominiums
Total | property	3		3
Hamilton Essex 81
ASSETS
Rental Properties	$ 5,314,109		$ 5,721,864
Cash & Cash Equivalents	1,226,034		1,032,885
Rent Receivable	170,515		209,427
Real Estate Tax Escrows	81,278		70,066
Prepaid Expenses & Other Assets	315,092		301,295
Total Assets	7,107,028		7,335,537
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	9,979,316		9,965,527
Accounts Payable & Accrued Expense	132,826		141,973
Advance Rental Pmts & Security Deposits	348,654		335,457
Total Liabilities	10,460,796		10,442,957
Partners' Capital	(3,353,768)		(3,107,420)
Total Liabilities and Partners' Capital	$ 7,107,028		$ 7,335,537
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (1,676,884)		$ (1,553,710)
Total units/ condominiums
Total	49		49				48
Hamilton Essex 81 | Residential buildings
Total units/ condominiums
Total | property	48		48
Hamilton Essex 81 | Commercial
Total units/ condominiums
Total | property	1		1
Hamilton Essex Development
ASSETS
Rental Properties	$ 2,582,568		$ 2,585,058
Cash & Cash Equivalents	58,242		132,374
Rent Receivable	77,243		79,310
Real Estate Tax Escrows	0
Prepaid Expenses & Other Assets	41,185		50,371
Total Assets	2,759,238		2,847,113
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable & Accrued Expense	1,521		43,750
Advance Rental Pmts & Security Deposits	20,660		19,866
Total Liabilities	22,181		63,616
Partners' Capital	2,737,057		2,783,497
Total Liabilities and Partners' Capital	$ 2,759,238		$ 2,847,113
Partners' Capital %-NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 1,368,529		$ 1,391,750
Total units/ condominiums
Total | property	1		1
Hamilton Essex Development | Commercial
Total units/ condominiums
Total | property	1		1
345 Franklin
ASSETS
Rental Properties	$ 4,395,208		$ 4,727,451
Cash & Cash Equivalents	118,521		553,282
Rent Receivable	537
Real Estate Tax Escrows	69,765		62,888
Prepaid Expenses & Other Assets	74,126		70,323
Total Assets	4,658,157		5,413,944
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	8,395,372		8,621,745
Accounts Payable & Accrued Expense	112,431		337,102
Advance Rental Pmts & Security Deposits	275,597		283,654
Total Liabilities	8,783,400		9,242,501
Partners' Capital	(4,125,243)		(3,828,557)
Total Liabilities and Partners' Capital	$ 4,658,157		$ 5,413,944
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (2,062,622)		$ (1,914,279)
Total units/ condominiums
Total | property	40		40
345 Franklin | Residential buildings
Total units/ condominiums
Total | property	40		40
Hamilton 1025
ASSETS
Rental Properties	$ 74,211		$ 77,475
Cash & Cash Equivalents	19,844		28,558
Rent Receivable	3,715		4,923
Prepaid Expenses & Other Assets	233		229
Total Assets	98,003		111,185
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable & Accrued Expense	1,201		22,181
Total Liabilities	1,201		22,181
Partners' Capital	96,802		89,004
Total Liabilities and Partners' Capital	$ 98,003		$ 111,185
Partners' Capital %-NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 48,401		$ 44,502
Total units/ condominiums
Total	1		1					176
Units to be retained | item								(49)
Hamilton 1025 | Residential buildings
Total units/ condominiums
Total | property			0
Hamilton 1025 | Commercial
Total units/ condominiums
Total | property	1		1
Hamilton Minuteman
ASSETS
Rental Properties	$ 4,118,836		$ 4,402,156
Cash & Cash Equivalents	267,322		377,286
Rent Receivable	254
Real Estate Tax Escrows	29,481		39,192
Prepaid Expenses & Other Assets	42,429		22,867
Total Assets	4,458,322		4,841,501
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	5,938,965		5,930,781
Accounts Payable & Accrued Expense	67,581		266,363
Advance Rental Pmts & Security Deposits	174,690		178,024
Total Liabilities	6,181,236		6,375,168
Partners' Capital	(1,722,914)		(1,533,667)
Total Liabilities and Partners' Capital	$ 4,458,322		$ 4,841,501
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (861,457)		$ (766,834)
Total units/ condominiums
Total | property	42		42
Hamilton Minuteman | Residential buildings
Total units/ condominiums
Total | property	42		42
Hamilton on Main Apts
ASSETS
Rental Properties	$ 12,594,324		$ 13,223,620
Cash & Cash Equivalents	1,218,033		1,201,715
Rent Receivable	20,744		21,329
Real Estate Tax Escrows	168,242		135,371
Prepaid Expenses & Other Assets	222,756		213,731
Total Assets	14,224,099		14,795,766
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	16,893,312		16,877,261
Accounts Payable & Accrued Expense	331,127		785,701
Advance Rental Pmts & Security Deposits	474,036		455,924
Total Liabilities	17,698,475		18,118,886
Partners' Capital	(3,474,376)		(3,323,120)
Total Liabilities and Partners' Capital	$ 14,224,099		$ 14,795,766
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (1,737,188)		$ (1,661,560)
Total units/ condominiums
Total | property	148		148
Hamilton on Main Apts | Residential buildings
Total units/ condominiums
Total | property	148		148
Dexter Park
ASSETS
Rental Properties	$ 72,539,709		$ 75,278,758
Cash & Cash Equivalents	2,566,642		3,827,354
Rent Receivable	121,564		71,071
Prepaid Expenses & Other Assets	2,449,104		2,283,781
Total Assets	77,677,019		81,460,964
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	124,730,738		124,666,115		$ 82,000,000
Accounts Payable & Accrued Expense	840,958		2,161,658
Advance Rental Pmts & Security Deposits	3,309,073		3,002,957
Total Liabilities	128,880,769		129,830,730
Partners' Capital	(51,203,750)		(48,369,766)
Total Liabilities and Partners' Capital	$ 77,677,019		$ 81,460,964
Partners' Capital %-NERA	40.00%		40.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (20,481,500)		$ (19,347,906)
Total units/ condominiums
Total	409		409			409
Dexter Park | Residential buildings
Total units/ condominiums
Total | property	409		409