INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Balance Sheet) (Details)	Jun. 30, 2024 USD ($) property	Dec. 31, 2023 USD ($)	Jun. 30, 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	$ 271,071,285	$ 269,804,946
Cash & Cash Equivalents	13,463,294	18,230,463
Rent Receivable	1,028,438	953,761
Real Estate Tax Escrows	2,385,456	2,229,703
Prepaid Expenses & Other Assets	9,549,493	8,369,775
Total Assets	383,700,368	385,730,690
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	407,457,271	408,660,292
Accounts Payable & Accrued Expense	5,394,443	5,720,088
Advance Rental Pmts & Security Deposits	10,396,651	9,996,887
Total Liabilities	450,688,131	451,085,074
Partners' Capital	(66,987,763)	(65,354,384)	$ (64,306,033)	$ (59,869,357)
Total Liabilities and Partners' Capital	383,700,368	385,730,690
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	(27,439,766)	$ (26,707,807)
Investment Properties
ASSETS
Rental Properties	101,051,070		104,760,781
Cash & Cash Equivalents	3,878,642		4,400,626
Rent Receivable	446,111		448,456
Real Estate Tax Escrows	334,200		274,066
Prepaid Expenses & Other Assets	4,351,960		3,409,066
Total Assets	110,061,983		113,292,995
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	165,905,350		166,031,339
Accounts Payable & Accrued Expense	1,195,814		1,381,218
Advance Rental Pmts & Security Deposits	5,519,946		4,859,356
Total Liabilities	172,621,110		172,271,913
Partners' Capital	(62,559,127)		(58,978,918)
Total Liabilities and Partners' Capital	110,061,983		113,292,995
Investment in Unconsolidated Joint Ventures	1,413,318		1,435,154
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	(27,439,766)		(25,963,031)
Total Investment in Unconsolidated Joint Ventures (Net)	$ (26,026,448)		$ (24,527,877)
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	$ 5,246,865		$ 5,614,141
Cash & Cash Equivalents	1,141,309		997,622
Rent Receivable	197,191		211,562
Real Estate Tax Escrows	81,453		67,281
Prepaid Expenses & Other Assets	351,532		326,548
Total Assets	7,018,350		7,217,154
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	9,982,764		9,968,975
Accounts Payable & Accrued Expense	136,741		165,149
Advance Rental Pmts & Security Deposits	374,170		309,790
Total Liabilities	10,493,675		10,443,914
Partners' Capital	(3,475,325)		(3,226,760)
Total Liabilities and Partners' Capital	$ 7,018,350		$ 7,217,154
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (1,737,662)		$ (1,613,380)
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 LLC [Member]
ASSETS
Rental Properties	$ 2,581,946		$ 2,584,435
Cash & Cash Equivalents	38,045		60,182
Rent Receivable	75,733		80,184
Prepaid Expenses & Other Assets	41,042		50,175
Total Assets	2,736,766		2,774,976
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable & Accrued Expense	2,000		1,500
Total Liabilities	2,000		1,500
Partners' Capital	2,734,766		2,773,476
Total Liabilities and Partners' Capital	$ 2,736,766		$ 2,774,976
Partners' Capital %-NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 1,367,383		$ 1,386,738
Total units/ condominiums
Total | property	1		1
Hamilton Essex Development LLC [Member] | Commercial
Total units/ condominiums
Total | property	1		1
Franklin 345 LLC [Member]
ASSETS
Rental Properties	$ 4,308,810		$ 4,650,472
Cash & Cash Equivalents	160,348		374,750
Rent Receivable	1,293
Real Estate Tax Escrows	31,596		23,412
Prepaid Expenses & Other Assets	110,132		104,393
Total Assets	4,612,179		5,153,027
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	8,337,358		8,565,993
Accounts Payable & Accrued Expense	70,945		124,185
Advance Rental Pmts & Security Deposits	307,229		335,465
Total Liabilities	8,715,532		9,025,643
Partners' Capital	(4,103,353)		(3,872,616)
Total Liabilities and Partners' Capital	$ 4,612,179		$ 5,153,027
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (2,051,676)		$ (1,936,308)
Total units/ condominiums
Total | property	40		40
Franklin 345 LLC [Member] | Residential buildings
Total units/ condominiums
Total | property	40		40
Hamilton 1025
ASSETS
Rental Properties	$ 73,395		$ 76,659
Cash & Cash Equivalents	17,673		16,853
Rent Receivable	3,309		4,931
Prepaid Expenses & Other Assets	1,038		1,049
Total Assets	95,415		99,492
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable & Accrued Expense	3,545		2,660
Total Liabilities	3,545		2,660
Partners' Capital	91,870		96,832
Total Liabilities and Partners' Capital	$ 95,415		$ 99,492
Partners' Capital %-NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 45,935		$ 48,416
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	$ 4,054,581		$ 4,324,746
Cash & Cash Equivalents	123,723		251,310
Rent Receivable	2,211		2,589
Real Estate Tax Escrows	29,661		43,542
Prepaid Expenses & Other Assets	71,628		42,306
Total Assets	4,281,804		4,664,493
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	5,941,010		5,932,827
Accounts Payable & Accrued Expense	68,813		74,550
Advance Rental Pmts & Security Deposits	176,456		192,370
Total Liabilities	6,186,279		6,199,747
Partners' Capital	(1,904,475)		(1,535,254)
Total Liabilities and Partners' Capital	$ 4,281,804		$ 4,664,493
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (952,238)		$ (767,627)
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	$ 12,884,525		$ 12,985,301
Cash & Cash Equivalents	795,809		611,236
Rent Receivable	19,042		9,044
Real Estate Tax Escrows	191,490		139,831
Prepaid Expenses & Other Assets	363,109		248,929
Total Assets	14,253,975		13,994,341
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	16,897,325		16,881,274
Accounts Payable & Accrued Expense	190,892		196,773
Advance Rental Pmts & Security Deposits	537,218		515,070
Total Liabilities	17,625,435		17,593,117
Partners' Capital	(3,371,460)		(3,598,776)
Total Liabilities and Partners' Capital	$ 14,253,975		$ 13,994,341
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (1,685,730)		$ (1,799,388)
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	$ 71,900,948		$ 74,525,027
Cash & Cash Equivalents	1,601,735		2,088,673
Rent Receivable	147,332		140,146
Prepaid Expenses & Other Assets	3,413,479		2,635,666
Total Assets	77,063,494		79,389,512
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	124,746,893		124,682,270		$ 82,000,000
Accounts Payable & Accrued Expense	722,878		816,401
Advance Rental Pmts & Security Deposits	4,124,873		3,506,661
Total Liabilities	129,594,644		129,005,332
Partners' Capital	(52,531,150)		(49,615,820)
Total Liabilities and Partners' Capital	$ 77,063,494		$ 79,389,512
Partners' Capital %-NERA	40.00%		40.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (21,012,460)		$ (19,846,328)
Total units/ condominiums
Total	409		409			409
Dexter Park | Residential buildings
Total units/ condominiums
Total | property	409		409