INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Balance Sheet) (Details)	Sep. 30, 2024 USD ($) property	Dec. 31, 2023 USD ($)	Sep. 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	$ 272,850,065	$ 269,804,946
Cash & Cash Equivalents	15,069,693	18,230,463
Rent Receivable	954,442	953,761
Real Estate Tax Escrows	2,501,806	2,229,703
Prepaid Expenses & Other Assets	8,424,809	8,369,775
Total Assets	387,356,540	385,730,690
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	406,846,877	408,660,292
Accounts Payable & Accrued Expense	6,397,947	5,720,088
Advance Rental Pmts & Security Deposits	9,820,867	9,996,887
Total Liabilities	452,817,146	451,085,074
Partners' Capital	(65,460,606)	(65,354,384)	$ (64,652,184)	$ (59,869,357)
Total Liabilities and Partners' Capital	387,356,540	385,730,690
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	(29,751,455)	$ (26,707,807)
Investment Properties
ASSETS
Rental Properties	101,018,798		103,534,879
Cash & Cash Equivalents	6,009,039		4,147,272
Rent Receivable	354,741		423,831
Real Estate Tax Escrows	179,598		316,860
Prepaid Expenses & Other Assets	3,495,190		3,263,319
Total Assets	111,057,366		111,686,161
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	172,319,151		166,000,690
Accounts Payable & Accrued Expense	1,492,507		1,376,094
Advance Rental Pmts & Security Deposits	4,499,433		4,283,555
Total Liabilities	178,311,091		171,660,339
Partners' Capital	(67,253,725)		(59,974,178)
Total Liabilities and Partners' Capital	111,057,366		111,686,161
Investment in Unconsolidated Joint Ventures	1,421,651		1,438,255
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	(29,751,455)		(26,377,405)
Total Investment in Unconsolidated Joint Ventures (Net)	$ (28,329,804)		$ (24,939,150)
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	$ 5,156,533		$ 5,517,486
Cash & Cash Equivalents	1,325,418		1,044,888
Rent Receivable	189,026		197,549
Real Estate Tax Escrows	78,201		70,897
Prepaid Expenses & Other Assets	335,724		331,025
Total Assets	7,084,902		7,161,845
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	9,986,211		9,972,422
Accounts Payable & Accrued Expense	330,733		162,273
Advance Rental Pmts & Security Deposits	366,000		354,788
Total Liabilities	10,682,944		10,489,483
Partners' Capital	(3,598,042)		(3,327,638)
Total Liabilities and Partners' Capital	$ 7,084,902		$ 7,161,845
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (1,799,020)		$ (1,663,819)
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	$ 2,581,323		$ 2,583,813
Cash & Cash Equivalents	62,274		73,383
Rent Receivable	74,223		80,264
Prepaid Expenses & Other Assets	38,022		47,178
Total Assets	2,755,842		2,784,638
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable & Accrued Expense	3,000		2,250
Total Liabilities	3,000		2,250
Partners' Capital	2,752,842		2,782,388
Total Liabilities and Partners' Capital	$ 2,755,842		$ 2,784,638
Partners' Capital %-NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 1,376,421		$ 1,391,194
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	$ 4,234,113		$ 4,567,358
Cash & Cash Equivalents	103,930		112,129
Rent Receivable	2,057		3,272
Real Estate Tax Escrows	71,866		66,029
Prepaid Expenses & Other Assets	100,024		94,692
Total Assets	4,511,990		4,843,480
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	8,278,765		8,509,683
Accounts Payable & Accrued Expense	126,680		111,162
Advance Rental Pmts & Security Deposits	262,862		277,672
Total Liabilities	8,668,307		8,898,517
Partners' Capital	(4,156,317)		(4,055,037)
Total Liabilities and Partners' Capital	$ 4,511,990		$ 4,843,480
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (2,078,158)		$ (2,027,519)
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	$ 72,579		$ 75,843
Cash & Cash Equivalents	17,234		16,328
Rent Receivable	2,482		4,526
Prepaid Expenses & Other Assets	769		777
Total Assets	93,064		97,474
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable & Accrued Expense	2,604		2,739
Advance Rental Pmts & Security Deposits			612
Total Liabilities	2,604		3,351
Partners' Capital	90,460		94,123
Total Liabilities and Partners' Capital	$ 93,064		$ 97,474
Partners' Capital %-NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 45,230		$ 47,061
Total units/ condominiums
Total	1		1					176
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	$ 3,977,260		$ 4,261,249
Cash & Cash Equivalents	81,885		404,742
Rent Receivable	7,656		1,890
Real Estate Tax Escrows	29,531		40,477
Prepaid Expenses & Other Assets	67,481		54,728
Total Assets	4,163,813		4,763,086
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	5,943,056		5,934,873
Accounts Payable & Accrued Expense	62,619		103,267
Advance Rental Pmts & Security Deposits	165,213		183,421
Total Liabilities	6,170,888		6,221,561
Partners' Capital	(2,007,075)		(1,458,475)
Total Liabilities and Partners' Capital	$ 4,163,813		$ 4,763,086
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (1,003,538)		$ (729,238)
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	$ 13,619,389		$ 12,742,373
Cash & Cash Equivalents	2,796,390		902,251
Rent Receivable	36,654		22,244
Real Estate Tax Escrows			139,457
Prepaid Expenses & Other Assets	280,877		233,231
Total Assets	16,733,310		14,039,556
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	23,348,070		16,885,286
Accounts Payable & Accrued Expense	257,732		192,429
Advance Rental Pmts & Security Deposits	492,520		492,006
Total Liabilities	24,098,322		17,569,721
Partners' Capital	(7,365,012)		(3,530,165)
Total Liabilities and Partners' Capital	$ 16,733,310		$ 14,039,556
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (3,682,506)		$ (1,765,082)
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	$ 71,377,601		$ 73,786,757
Cash & Cash Equivalents	1,621,908		1,593,551
Rent Receivable	42,643		114,086
Prepaid Expenses & Other Assets	2,672,293		2,501,688
Total Assets	75,714,445		77,996,082
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	124,763,049		124,698,426		$ 82,000,000
Accounts Payable & Accrued Expense	709,139		801,974
Advance Rental Pmts & Security Deposits	3,212,838		2,975,056
Total Liabilities	128,685,026		128,475,456
Partners' Capital	(52,970,581)		(50,479,374)
Total Liabilities and Partners' Capital	$ 75,714,445		$ 77,996,082
Partners' Capital %-NERA	40.00%		40.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Ventures	$ (21,188,233)		$ (20,191,749)
Total units/ condominiums
Total	409		409			409
Dexter Park | Residential buildings
Total units/ condominiums
Total | property	409		409