INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Balance Sheet) (Details)	Sep. 30, 2023 USD ($) property	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($) property	Dec. 31, 2021 USD ($)	May 31, 2018 USD ($)	Oct. 28, 2009 item	Mar. 07, 2005 item	Mar. 02, 2005 item	Sep. 30, 2004 item	Aug. 31, 2004 item	Nov. 30, 2001 item
ASSETS
Rental Properties	$ 272,299,577	$ 241,076,431
Cash & Cash Equivalents	16,141,398	49,560,723
Rent Receivable	929,320	655,814
Real Estate Tax Escrows	2,202,737	1,943,680
Prepaid Expenses & Other Assets	9,894,284	8,814,112
Total Assets	386,158,244	391,820,280
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	409,253,129	410,966,199
Accounts Payable & Accrued Expense	5,541,429	7,271,729
Advance Rental Pmts & Security Deposits	9,638,465	9,032,580
Total Liabilities	450,810,428	451,689,637
Partners' Capital	(64,652,184)	(59,869,357)	$ (61,002,779)	$ (49,292,607)
Total Liabilities and Partners' Capital	386,158,244	391,820,280
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	(26,377,405)	$ (24,419,129)
Investment Properties
ASSETS
Rental Properties	103,534,879		108,350,429
Cash & Cash Equivalents	4,147,272		4,552,975
Rent Receivable	423,831		350,682
Real Estate Tax Escrows	316,860		282,364
Prepaid Expenses & Other Assets	3,263,319		3,048,044
Total Assets	111,686,161		116,584,494
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	166,000,690		166,119,958
Accounts Payable & Accrued Expense	1,376,094		1,197,476
Advance Rental Pmts & Security Deposits	4,283,555		4,063,914
Total Liabilities	171,660,339		171,381,348
Partners' Capital	(59,974,178)		(54,796,854)
Total Liabilities and Partners' Capital	111,686,161		116,584,494
Investment in Unconsolidated Joint Ventures	1,438,255		1,439,150
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	(26,377,405)		(24,136,809)
Total Investment in Unconsolidated Joint Ventures (Net)	$ (24,939,150)		$ (22,697,659)
Total units/ condominiums
Total | property	865		865
Units to be retained | property	690		690
Total number of units sold | property	175		175
Investment Properties | Residential buildings
Total units/ condominiums
Total | property	862		862
Investment Properties | Commercial
Total units/ condominiums
Total | property	3		3
Hamilton Essex 81
ASSETS
Rental Properties	$ 5,517,486		$ 5,935,095
Cash & Cash Equivalents	1,044,888		883,219
Rent Receivable	197,549		198,014
Real Estate Tax Escrows	70,897		74,625
Prepaid Expenses & Other Assets	331,025		321,917
Total Assets	7,161,845		7,412,870
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	9,972,422		9,958,633
Accounts Payable & Accrued Expense	162,273		120,784
Advance Rental Pmts & Security Deposits	354,788		332,572
Total Liabilities	10,489,483		10,411,989
Partners' Capital	(3,327,638)		(2,999,119)
Total Liabilities and Partners' Capital	$ 7,161,845		$ 7,412,870
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (1,663,819)		$ (1,499,560)
Total units/ condominiums
Total	49		49				48
Units to be retained | property	49		49
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	$ 2,583,813		$ 2,586,302
Cash & Cash Equivalents	73,383		88,190
Rent Receivable	80,264		77,561
Prepaid Expenses & Other Assets	47,178		56,261
Total Assets	2,784,638		2,808,314
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable & Accrued Expense	2,250		2,250
Advance Rental Pmts & Security Deposits			19,865
Total Liabilities	2,250		22,115
Partners' Capital	2,782,388		2,786,199
Total Liabilities and Partners' Capital	$ 2,784,638		$ 2,808,314
Partners' Capital %-NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 1,391,194		$ 1,393,100
Total units/ condominiums
Total | property	1		1
Units to be retained | property	1		1
Hamilton Essex Development | Commercial
Total units/ condominiums
Total | property	1		1
345 Franklin
ASSETS
Rental Properties	$ 4,567,358		$ 4,852,841
Cash & Cash Equivalents	112,129		265,808
Rent Receivable	3,272		1,240
Real Estate Tax Escrows	66,029		69,748
Prepaid Expenses & Other Assets	94,692		117,224
Total Assets	4,843,480		5,306,861
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	8,509,683		8,731,598
Accounts Payable & Accrued Expense	111,162		92,492
Advance Rental Pmts & Security Deposits	277,672		280,818
Total Liabilities	8,898,517		9,104,908
Partners' Capital	(4,055,037)		(3,798,047)
Total Liabilities and Partners' Capital	$ 4,843,480		$ 5,306,861
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (2,027,519)		$ (1,899,023)
Total units/ condominiums
Total	40		40								40
Units to be retained | property	40		40
345 Franklin | Residential buildings
Total units/ condominiums
Total | property	40		40
Hamilton 1025
ASSETS
Rental Properties	$ 75,843		$ 79,107
Cash & Cash Equivalents	16,328		9,882
Rent Receivable	4,526		4,906
Prepaid Expenses & Other Assets	777		757
Total Assets	97,474		94,652
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable & Accrued Expense	2,739		2,553
Advance Rental Pmts & Security Deposits	612
Total Liabilities	3,351		2,553
Partners' Capital	94,123		92,099
Total Liabilities and Partners' Capital	$ 97,474		$ 94,652
Partners' Capital %-NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 47,061		$ 46,050
Total units/ condominiums
Total	176		176					176
Units to be retained	1		1					(49)
Total number of units sold | property	175		175
Hamilton 1025 | Residential buildings
Total units/ condominiums
Total | property	175		175
Hamilton 1025 | Commercial
Total units/ condominiums
Total | property	1		1
Hamilton Minuteman
ASSETS
Rental Properties	$ 4,261,249		$ 4,551,023
Cash & Cash Equivalents	404,742		175,451
Rent Receivable	1,890		5,299
Real Estate Tax Escrows	40,477		32,497
Prepaid Expenses & Other Assets	54,728		28,665
Total Assets	4,763,086		4,792,935
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	5,934,873		5,926,689
Accounts Payable & Accrued Expense	103,267		59,237
Advance Rental Pmts & Security Deposits	183,421		161,741
Total Liabilities	6,221,561		6,147,667
Partners' Capital	(1,458,475)		(1,354,732)
Total Liabilities and Partners' Capital	$ 4,763,086		$ 4,792,935
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (729,238)		$ (677,366)
Total units/ condominiums
Total	42		42						42
Units to be retained | property	42		42
Hamilton Minuteman | Residential buildings
Total units/ condominiums
Total | property	42		42
Hamilton on Main Apts
ASSETS
Rental Properties	$ 12,742,373		$ 13,688,356
Cash & Cash Equivalents	902,251		910,242
Rent Receivable	22,244		18,832
Real Estate Tax Escrows	139,457		105,494
Prepaid Expenses & Other Assets	233,231		224,845
Total Assets	14,039,556		14,947,769
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	16,885,286		16,869,235
Accounts Payable & Accrued Expense	192,429		163,200
Advance Rental Pmts & Security Deposits	492,006		430,923
Total Liabilities	17,569,721		17,463,358
Partners' Capital	(3,530,165)		(2,515,589)
Total Liabilities and Partners' Capital	$ 14,039,556		$ 14,947,769
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (1,765,082)		$ (1,257,794)
Total units/ condominiums
Total	148		148							280
Units to be retained | property	148		148
Hamilton on Main Apts | Residential buildings
Total units/ condominiums
Total | property	148		148
Dexter Park
ASSETS
Rental Properties	$ 73,786,757		$ 76,657,705
Cash & Cash Equivalents	1,593,551		2,220,183
Rent Receivable	114,086		44,830
Prepaid Expenses & Other Assets	2,501,688		2,298,375
Total Assets	77,996,082		81,221,093
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	124,698,426		124,633,803		$ 82,000,000
Accounts Payable & Accrued Expense	801,974		756,960
Advance Rental Pmts & Security Deposits	2,975,056		2,837,995
Total Liabilities	128,475,456		128,228,758
Partners' Capital	(50,479,374)		(47,007,665)
Total Liabilities and Partners' Capital	$ 77,996,082		$ 81,221,093
Partners' Capital %-NERA	40.00%		40.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (20,191,749)		$ (18,803,066)
Total units/ condominiums
Total	409		409			409
Units to be retained | property	409		409
Dexter Park | Residential buildings
Total units/ condominiums
Total | property	409		409