INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Balance Sheet) (Details)	Sep. 30, 2022 USD ($) property	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($) property	Dec. 31, 2020 USD ($)	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	$ 242,937,926	$ 251,355,202
Cash and Cash Equivalents	59,473,939	96,083,508
Rents Receivable	414,659	935,303
Real Estate Tax Escrows	1,907,378	861,697
Prepaid Expenses and Other Assets	7,613,638	6,183,981
Total Assets	387,782,276	356,875,579
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	411,475,632	370,481,390
Accounts Payable and Accrued Expenses	4,298,250	4,324,879
Advance Rental Payments and Security Deposits	8,874,364	8,369,497
Total Liabilities	448,785,055	406,168,186
Partners' Capital	(61,002,779)	(49,292,607)	$ (44,775,300)	$ (41,469,045)
Total Liabilities and Partners' Capital	387,782,276	356,875,579
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	(24,136,809)	$ (22,992,420)
Investment Properties
ASSETS
Rental Properties	108,350,429		112,651,474
Cash and Cash Equivalents	4,552,975		3,436,649
Rents Receivable	350,682		392,089
Real Estate Tax Escrows	282,364		297,534
Prepaid Expenses and Other Assets	3,048,044		2,684,999
Total Assets	116,584,494		119,462,745
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	166,119,958		166,230,563
Accounts Payable and Accrued Expenses	1,197,476		1,228,687
Advance Rental Payments and Security Deposits	4,063,914		3,493,954
Total Liabilities	171,381,348		170,953,204
Partners' Capital	(54,796,854)		(51,490,459)
Total Liabilities and Partners' Capital	116,584,494		119,462,745
Investment in Unconsolidated Joint Ventures	1,439,150		1,418,974
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	(24,136,809)		(22,734,423)
Total Investment in Unconsolidated Joint Ventures (Net)	$ (22,697,659)		$ (21,315,449)
Total units/ condominiums
Total | property	690		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	687		862
Investment Properties | Commercial
Total units/ condominiums
Total | property	3		3
Hamilton Essex 81
ASSETS
Rental Properties	$ 5,935,095		$ 6,376,891
Cash and Cash Equivalents	883,219		230,394
Rents Receivable	198,014		65,313
Real Estate Tax Escrows	74,625		77,685
Prepaid Expenses and Other Assets	321,917		311,513
Total Assets	7,412,870		7,061,796
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	9,958,633		9,944,844
Accounts Payable and Accrued Expenses	120,784		82,137
Advance Rental Payments and Security Deposits	332,572		189,746
Total Liabilities	10,411,989		10,216,727
Partners' Capital	(2,999,119)		(3,154,931)
Total Liabilities and Partners' Capital	$ 7,412,870		$ 7,061,796
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (1,499,560)		$ (1,577,467)
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	$ 2,586,302		$ 2,588,792
Cash and Cash Equivalents	88,190		73,049
Rents Receivable	77,561		13,744
Prepaid Expenses and Other Assets	56,261		67,410
Total Assets	2,808,314		2,742,995
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable and Accrued Expenses	2,250		2,250
Advance Rental Payments and Security Deposits	19,865
Total Liabilities	22,115		2,250
Partners' Capital	2,786,199		2,740,745
Total Liabilities and Partners' Capital	$ 2,808,314		$ 2,742,995
Partners' Capital %-NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 1,393,100		$ 1,370,373
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	$ 4,852,841		$ 5,139,866
Cash and Cash Equivalents	265,808		154,633
Rents Receivable	1,240		23,113
Real Estate Tax Escrows	69,748		62,506
Prepaid Expenses and Other Assets	117,224		123,115
Total Assets	5,306,861		5,503,233
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	8,731,598		8,944,849
Accounts Payable and Accrued Expenses	92,492		99,583
Advance Rental Payments and Security Deposits	280,818		247,951
Total Liabilities	9,104,908		9,292,383
Partners' Capital	(3,798,047)		(3,789,150)
Total Liabilities and Partners' Capital	$ 5,306,861		$ 5,503,233
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (1,899,023)		$ (1,894,576)
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	$ 79,107		$ 82,371
Cash and Cash Equivalents	9,882		9,776
Rents Receivable	4,906		7,081
Prepaid Expenses and Other Assets	757		685
Total Assets	94,652		99,913
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable and Accrued Expenses	2,553		2,711
Total Liabilities	2,553		2,711
Partners' Capital	92,099		97,202
Total Liabilities and Partners' Capital	$ 94,652		$ 99,913
Partners' Capital %-NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 46,050		$ 48,601
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	$ 4,551,023		$ 4,766,334
Cash and Cash Equivalents	175,451		231,357
Rents Receivable	5,299		7,285
Real Estate Tax Escrows	32,497		40,025
Prepaid Expenses and Other Assets	28,665		30,592
Total Assets	4,792,935		5,075,593
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	5,926,689		5,918,506
Accounts Payable and Accrued Expenses	59,237		67,629
Advance Rental Payments and Security Deposits	161,741		154,400
Total Liabilities	6,147,667		6,140,535
Partners' Capital	(1,354,732)		(1,064,942)
Total Liabilities and Partners' Capital	$ 4,792,935		$ 5,075,593
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (677,366)		$ (532,472)
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	$ 13,688,356		$ 14,522,033
Cash and Cash Equivalents	910,242		602,344
Rents Receivable	18,832		38,832
Real Estate Tax Escrows	105,494		117,318
Prepaid Expenses and Other Assets	224,845		195,099
Total Assets	14,947,769		15,475,626
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	16,869,235		16,853,184
Accounts Payable and Accrued Expenses	163,200		169,515
Advance Rental Payments and Security Deposits	430,923		474,463
Total Liabilities	17,463,358		17,497,162
Partners' Capital	(2,515,589)		(2,021,536)
Total Liabilities and Partners' Capital	$ 14,947,769		$ 15,475,626
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (1,257,794)		$ (1,010,769)
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	$ 76,657,705		$ 79,175,187
Cash and Cash Equivalents	2,220,183		2,135,096
Rents Receivable	44,830		236,721
Prepaid Expenses and Other Assets	2,298,375		1,956,585
Total Assets	81,221,093		83,503,589
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	124,633,803		124,569,180		$ 82,000,000
Accounts Payable and Accrued Expenses	756,960		804,862
Advance Rental Payments and Security Deposits	2,837,995		2,427,394
Total Liabilities	128,228,758		127,801,436
Partners' Capital	(47,007,665)		(44,297,847)
Total Liabilities and Partners' Capital	$ 81,221,093		$ 83,503,589
Partners' Capital %-NERA	40.00%		40.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (18,803,066)		$ (17,719,140)
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