INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Balance Sheet) (Details)	Mar. 31, 2023 USD ($) property	Dec. 31, 2022 USD ($)	Mar. 31, 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	$ 248,529,340	$ 241,076,431
Cash and Cash Equivalents	24,654,625	49,560,723
Rents Receivable	801,990	655,814
Real Estate Tax Escrows	2,031,757	1,943,680
Prepaid Expenses and Other Assets	9,782,554	8,814,112
Total Assets	384,996,394	391,820,280
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	410,449,284	410,966,199
Accounts Payable and Accrued Expenses	5,094,811	7,271,729
Advance Rental Payments and Security Deposits	9,137,784	9,032,580
Total Liabilities	449,926,168	451,689,637
Partners' Capital	(64,929,774)	(59,869,357)	$ (56,109,137)	$ (49,292,607)
Total Liabilities and Partners' Capital	384,996,394	391,820,280
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	(25,244,289)	$ (24,419,129)
Investment Properties
ASSETS
Rental Properties	106,016,382		110,566,922
Cash and Cash Equivalents	7,153,454		4,090,896
Rents Receivable	386,060		443,817
Real Estate Tax Escrows	307,517		263,053
Prepaid Expenses and Other Assets	2,942,597		2,725,776
Total Assets	116,806,010		118,090,464
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	166,061,429		166,176,323
Accounts Payable and Accrued Expenses	3,758,728		1,229,811
Advance Rental Payments and Security Deposits	4,275,882		3,691,434
Total Liabilities	174,096,039		171,097,568
Partners' Capital	(57,290,029)		(53,007,104)
Total Liabilities and Partners' Capital	116,806,010		118,090,464
Investment in Unconsolidated Joint Ventures	1,436,252		1,460,630
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	(25,244,289)		(23,417,093)
Total Investment in Unconsolidated Joint Ventures (Net)	$ (23,808,037)		$ (21,956,463)
Total units/ condominiums
Total | property	690		690
Units to be retained | property	690		690
Total number of units sold | property			175
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	$ 5,721,864		$ 6,158,533
Cash and Cash Equivalents	1,032,885		579,073
Rents Receivable	209,427		218,440
Real Estate Tax Escrows	70,066		74,171
Prepaid Expenses and Other Assets	301,295		297,060
Total Assets	7,335,537		7,327,277
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	9,965,527		9,951,738
Accounts Payable and Accrued Expenses	141,973		72,582
Advance Rental Payments and Security Deposits	335,457		210,186
Total Liabilities	10,442,957		10,234,506
Partners' Capital	(3,107,420)		(2,907,229)
Total Liabilities and Partners' Capital	$ 7,335,537		$ 7,327,277
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (1,553,710)		$ (1,453,616)
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	$ 2,585,058		$ 2,587,547
Cash and Cash Equivalents	132,374		112,861
Rents Receivable	79,310		71,993
Prepaid Expenses and Other Assets	50,371		59,537
Total Assets	2,847,113		2,831,938
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable and Accrued Expenses	43,750		3,750
Advance Rental Payments and Security Deposits	19,866
Total Liabilities	63,616		3,750
Partners' Capital	2,783,497		2,828,188
Total Liabilities and Partners' Capital	$ 2,847,113		$ 2,831,938
Partners' Capital %-NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 1,391,749		$ 1,414,094
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	$ 4,727,451		$ 4,984,470
Cash and Cash Equivalents	553,282		150,018
Rents Receivable			5,694
Real Estate Tax Escrows	62,888		68,049
Prepaid Expenses and Other Assets	70,323		104,028
Total Assets	5,413,944		5,312,259
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	8,621,745		8,839,286
Accounts Payable and Accrued Expenses	337,102		94,711
Advance Rental Payments and Security Deposits	283,654		235,125
Total Liabilities	9,242,501		9,169,122
Partners' Capital	(3,828,557)		(3,856,863)
Total Liabilities and Partners' Capital	$ 5,413,944		$ 5,312,259
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (1,914,279)		$ (1,928,433)
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	$ 77,475		$ 80,739
Cash and Cash Equivalents	28,558		9,501
Rents Receivable	4,923		6,525
Prepaid Expenses and Other Assets	229		207
Total Assets	111,185		96,972
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable and Accrued Expenses	22,181		3,901
Total Liabilities	22,181		3,901
Partners' Capital	89,004		93,071
Total Liabilities and Partners' Capital	$ 111,185		$ 96,972
Partners' Capital %-NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 44,502		$ 46,536
Total units/ condominiums
Total	1		176					176
Units to be retained	1		1					(49)
Total number of units sold | property			175
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	$ 4,402,156		$ 4,623,273
Cash and Cash Equivalents	377,286		202,934
Rents Receivable			18,702
Real Estate Tax Escrows	39,192		32,369
Prepaid Expenses and Other Assets	22,867		17,181
Total Assets	4,841,501		4,894,459
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	5,930,781		5,922,598
Accounts Payable and Accrued Expenses	266,363		75,931
Advance Rental Payments and Security Deposits	178,024		158,851
Total Liabilities	6,375,168		6,157,380
Partners' Capital	(1,533,667)		(1,262,921)
Total Liabilities and Partners' Capital	$ 4,841,501		$ 4,894,459
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (766,834)		$ (631,462)
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	$ 13,223,620		$ 14,069,945
Cash and Cash Equivalents	1,201,715		676,290
Rents Receivable	21,329		24,636
Real Estate Tax Escrows	135,371		88,464
Prepaid Expenses and Other Assets	213,731		190,308
Total Assets	14,795,766		15,049,643
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	16,877,261		16,861,209
Accounts Payable and Accrued Expenses	785,701		186,788
Advance Rental Payments and Security Deposits	455,924		432,060
Total Liabilities	18,118,886		17,480,057
Partners' Capital	(3,323,120)		(2,430,414)
Total Liabilities and Partners' Capital	$ 14,795,766		$ 15,049,643
Partners' Capital %-NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (1,661,560)		$ (1,215,208)
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	$ 75,278,758		$ 78,062,415
Cash and Cash Equivalents	3,827,354		2,360,219
Rents Receivable	71,071		97,827
Prepaid Expenses and Other Assets	2,283,781		2,057,455
Total Assets	81,460,964		82,577,916
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	124,666,115		124,601,492		$ 82,000,000
Accounts Payable and Accrued Expenses	2,161,658		792,148
Advance Rental Payments and Security Deposits	3,002,957		2,655,212
Total Liabilities	129,830,730		128,048,852
Partners' Capital	(48,369,766)		(45,470,936)
Total Liabilities and Partners' Capital	$ 81,460,964		$ 82,577,916
Partners' Capital %-NERA	40.00%		40.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (19,347,906)		$ (18,188,375)
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