INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Balance Sheet) (Details)	Sep. 30, 2026 USD ($) property	Dec. 31, 2025 USD ($)	Sep. 30, 2025 USD ($) property	Dec. 31, 2024 USD ($)	May 31, 2018 USD ($)	Oct. 28, 2009 item	Mar. 07, 2005 item	Mar. 02, 2005 item
ASSETS
Rental Properties	$ 447,198,252	$ 458,779,526
Cash & Cash Equivalents	22,579,265	26,668,978
Rent Receivable	1,819,729	1,428,053
Real Estate Tax Escrow	3,376,270	3,057,689
Prepaid Expenses & Other Assets	9,921,784	11,381,248
Total Assets	486,307,536	505,331,191
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	522,186,323	527,596,823
Accounts Payable & Accrued Expense	7,084,512	8,866,529
Advance Rental Payments and Security Deposits	11,681,753	12,288,303
Total Liabilities	571,711,639	579,546,772
Partners' Capital	(85,404,103)	(74,215,581)	$ (71,041,111)	$ (62,433,903)
Total Liabilities and Partners' Capital	486,307,536	505,331,191
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	(30,759,051)	$ (30,795,117)
Investment Properties
ASSETS
Rental Properties	95,521,594		98,413,204
Cash & Cash Equivalents	11,014,803		8,773,391
Rent Receivable	484,632		421,257
Real Estate Tax Escrow	181,464		186,282
Prepaid Expenses & Other Assets	3,321,704		3,425,865
Total Assets	110,524,197		111,219,999
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	174,097,891		174,233,798
Accounts Payable & Accrued Expense	1,260,224		1,402,815
Advance Rental Payments and Security Deposits	3,961,809		4,368,528
Total Liabilities	179,319,924		180,005,141
Partners' Capital	(68,795,727)		(68,785,142)
Total Liabilities and Partners' Capital	110,524,197		111,219,999
Investment in Unconsolidated Joint Ventures	1,412,236		1,405,626
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	(30,759,051)		(30,603,056)
Total Investment in Unconsolidated Joint Ventures (Net)	$ (29,346,815)		$ (29,197,430)
Total units/ condominiums
Total | property	690		690
Investment Properties | Apartments
Total units/ condominiums
Total | property	687		687
Investment Properties | Commercial
Total units/ condominiums
Total | property	3		3
Hamilton Essex 81
ASSETS
Rental Properties	$ 5,682,305		$ 5,298,785
Cash & Cash Equivalents	1,359,981		2,957,779
Rent Receivable	106,730		153,153
Real Estate Tax Escrow	74,962		70,289
Prepaid Expenses & Other Assets	199,147		397,786
Total Assets	7,423,125		8,877,792
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	12,061,030		12,044,033
Accounts Payable & Accrued Expense	119,657		222,266
Advance Rental Payments and Security Deposits	371,005		349,841
Total Liabilities	12,551,692		12,616,140
Partners' Capital	(5,128,567)		(3,738,348)
Total Liabilities and Partners' Capital	$ 7,423,125		$ 8,877,792
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (2,564,284)		$ (1,869,173)
Total units/ condominiums
Total	49		49				48
Hamilton Essex 81 | Apartments
Total units/ condominiums
Total | property	48		48
Hamilton Essex 81 | Commercial
Total units/ condominiums
Total | property	1		1
Hamilton Essex Development
ASSETS
Rental Properties	$ 2,576,967		$ 2,578,834
Cash & Cash Equivalents	104,028		64,506
Rent Receivable	45,929		62,810
Prepaid Expenses & Other Assets	20,098		29,387
Total Assets	2,747,022		2,735,537
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable & Accrued Expense	3,000		7,000
Total Liabilities	3,000		7,000
Partners' Capital	2,744,022		2,728,537
Total Liabilities and Partners' Capital	$ 2,747,022		$ 2,735,537
Partners' Capital %-NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 1,372,011		$ 1,364,269
Total units/ condominiums
Total | property	1		1
Hamilton Essex Development | Commercial
Total units/ condominiums
Total | property	1		1
345 Franklin
ASSETS
Rental Properties	$ 3,616,392		$ 3,944,259
Cash & Cash Equivalents	63,420		100,046
Rent Receivable	12,979		10,492
Real Estate Tax Escrow	69,212		79,926
Prepaid Expenses & Other Assets	99,730		92,822
Total Assets	3,861,733		4,227,545
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	7,788,482		8,038,487
Accounts Payable & Accrued Expense	105,352		105,473
Advance Rental Payments and Security Deposits	285,675		280,627
Total Liabilities	8,179,509		8,424,587
Partners' Capital	(4,317,776)		(4,197,042)
Total Liabilities and Partners' Capital	$ 3,861,733		$ 4,227,545
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (2,158,888)		$ (2,098,520)
Total units/ condominiums
Total | property	40		40
345 Franklin | Apartments
Total units/ condominiums
Total | property	40		40
Hamilton 1025
ASSETS
Rental Properties	$ 66,051		$ 69,315
Cash & Cash Equivalents	21,368		14,268
Rent Receivable	4,038		895
Prepaid Expenses & Other Assets	933		939
Total Assets	92,390		85,417
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable & Accrued Expense	2,914		2,702
Advance Rental Payments and Security Deposits	9,026
Total Liabilities	11,940		2,702
Partners' Capital	80,450		82,715
Total Liabilities and Partners' Capital	$ 92,390		$ 85,417
Partners' Capital %-NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 40,225		$ 41,358
Total units/ condominiums
Total	1		1					176
Units to be retained | item								49
Hamilton 1025 | Apartments
Total units/ condominiums
Total | property			0
Hamilton 1025 | Commercial
Total units/ condominiums
Total | property	1		1
Hamilton Minuteman Apts
ASSETS
Rental Properties	$ 3,721,129		$ 3,781,556
Cash & Cash Equivalents	1,024,960		618,244
Rent Receivable	13,838		13,286
Real Estate Tax Escrow	37,290		36,067
Prepaid Expenses & Other Assets	66,321		78,424
Total Assets	4,863,538		4,527,577
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	5,959,423		5,951,240
Accounts Payable & Accrued Expense	71,246		70,503
Advance Rental Payments and Security Deposits	157,180		159,475
Total Liabilities	6,187,849		6,181,218
Partners' Capital	(1,324,311)		(1,653,641)
Total Liabilities and Partners' Capital	$ 4,863,538		$ 4,527,577
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (662,156)		$ (826,821)
Total units/ condominiums
Total | property	42		42
Hamilton Minuteman Apts | Apartments
Total units/ condominiums
Total | property	42		42
Hamilton on Main Apts
ASSETS
Rental Properties	$ 12,818,784		$ 13,372,001
Cash & Cash Equivalents	527,885		287,451
Rent Receivable	62,327		35,349
Prepaid Expenses & Other Assets	413,558		319,765
Total Assets	13,822,554		14,014,566
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	23,396,661		23,372,366
Accounts Payable & Accrued Expense	223,804		222,068
Advance Rental Payments and Security Deposits	541,144		476,085
Total Liabilities	24,161,609		24,070,519
Partners' Capital	(10,339,055)		(10,055,953)
Total Liabilities and Partners' Capital	$ 13,822,554		$ 14,014,566
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (5,169,528)		$ (5,027,977)
Total units/ condominiums
Total | property	148		148
Hamilton on Main Apts | Apartments
Total units/ condominiums
Total | property	148		148
Dexter Park
ASSETS
Rental Properties	$ 67,039,966		$ 69,368,454
Cash & Cash Equivalents	7,913,161		4,731,097
Rent Receivable	238,791		145,272
Prepaid Expenses & Other Assets	2,521,917		2,506,742
Total Assets	77,713,835		76,751,565
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	124,892,295		124,827,672		$ 82,000,000
Accounts Payable & Accrued Expense	734,251		772,803
Advance Rental Payments and Security Deposits	2,597,779		3,102,500
Total Liabilities	128,224,325		128,702,975
Partners' Capital	(50,510,490)		(51,951,410)
Total Liabilities and Partners' Capital	$ 77,713,835		$ 76,751,565
Partners' Capital %-NERA	40.00%		40.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (20,204,196)		$ (20,780,565)
Total units/ condominiums
Total	409		409			409
Dexter Park | Apartments
Total units/ condominiums
Total | property	409		409