INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Balance Sheet) (Details)	Jun. 30, 2017 USD ($) property item	Dec. 31, 2016 USD ($) item	Jun. 30, 2016 USD ($) property	Oct. 28, 2009 USD ($) item	Oct. 03, 2005 USD ($) item	Mar. 07, 2005 item	Mar. 02, 2005 USD ($) item	Sep. 30, 2004 USD ($) item	Aug. 31, 2004 USD ($) item	Nov. 30, 2001 USD ($) item
LIABILITIES AND PARTNERS' CAPITAL
Investment in Unconsolidated Joint Ventures	$ 9,029,232	$ 8,336,505
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	(2,754,771)	$ (2,577,606)
Investment Properties
ASSETS
Rental Properties	138,765,415		$ 145,999,494
Cash & Cash Equivalents	1,523,954		1,640,161
Rent Receivable	226,448		183,110
Real Estate Tax Escrow	661,767		539,506
Prepaid Expenses & Other Assets	3,207,143		2,690,531
Total Assets	144,384,727		151,052,802
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	124,938,378		134,906,750
Accounts Payable and Accrued Expenses	1,006,173		986,745
Advance Rental Payments and Security Deposits	4,479,127		4,142,392
Total Liabilities	130,423,678		140,035,887
Partners' Capital	13,961,049		11,016,915
Total Liabilities and Capital	144,384,727		151,052,802
Investment in Unconsolidated Joint Ventures	9,029,232		7,079,963
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	(2,754,771)		(2,468,308)
Total Investment in Unconsolidated Joint Ventures (Net)	$ 6,274,462		$ 4,611,654
Total units/ condominiums
Total | property	1,033		1,033
Units to be retained | property	690		786
Units to be sold | property	343		247
Units sold | property	278		245
Unsold units | property	65		2
Units unsold with deposits for future sale | property	13
Investment Properties | Residential buildings
Total units/ condominiums
Total | property	1,030		1,030
Investment Properties | Commercial
Total units/ condominiums
Total | property	3		3
Hamilton Essex 81
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	$ 9,886,240
Total units/ condominiums
Total | item						48
Hamilton Essex 81 | NERA 50%
ASSETS
Rental Properties	7,798,556		$ 8,233,823
Cash & Cash Equivalents	95,520		111,271
Rent Receivable	5,529		46,713
Real Estate Tax Escrow	111,718		83,814
Prepaid Expenses & Other Assets	105,580		105,562
Total Assets	8,116,903		8,581,183
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	9,886,240		9,872,451
Accounts Payable and Accrued Expenses	62,932		54,553
Advance Rental Payments and Security Deposits	251,183		196,372
Total Liabilities	10,200,355		10,123,376
Partners' Capital	(2,083,452)		(1,542,193)
Total Liabilities and Capital	$ 8,116,903		$ 8,581,183
Partners' Capital % - NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (1,041,726)		$ (771,097)
Total units/ condominiums
Total | property	49		49
Units to be retained | property	49		49
Hamilton Essex 81 | Residential buildings | NERA 50%
Total units/ condominiums
Total | property	48		48
Hamilton Essex 81 | Commercial | NERA 50%
Total units/ condominiums
Total | property	1		1
Hamilton Essex Development | NERA 50%
ASSETS
Rental Properties	$ 2,622,021		$ 2,617,251
Cash & Cash Equivalents	108,751		42,323
Prepaid Expenses & Other Assets	1,533		1,351
Total Assets	2,732,305		2,660,925
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable and Accrued Expenses	850		850
Total Liabilities	850		850
Partners' Capital	2,731,455		2,660,075
Total Liabilities and Capital	$ 2,732,305		$ 2,660,925
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 1,365,727		$ 1,330,037
Total units/ condominiums
Total | property	1		1
Units to be retained | property	1		1
Hamilton Essex Development | Commercial | NERA 50%
Total units/ condominiums
Total | property	1		1
345 Franklin
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	$ 9,761,919
Partners' Capital % - NERA										50.00%
Investment in Unconsolidated Joint Ventures										$ 1,533,000
Total units/ condominiums
Total | item										40
345 Franklin | NERA 50%
ASSETS
Rental Properties	6,494,266		$ 6,607,281
Cash & Cash Equivalents	45,291		183,078
Rent Receivable	9,470		8,347
Real Estate Tax Escrow	18,889		16,713
Prepaid Expenses & Other Assets	42,394		37,218
Total Assets	6,610,310		6,852,637
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	9,761,919		9,920,098
Accounts Payable and Accrued Expenses	63,851		67,207
Advance Rental Payments and Security Deposits	210,629		259,754
Total Liabilities	10,036,399		10,247,059
Partners' Capital	(3,426,089)		(3,394,422)
Total Liabilities and Capital	$ 6,610,310		$ 6,852,637
Partners' Capital % - NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (1,713,045)		$ (1,697,211)
Total units/ condominiums
Total | property	40		40
Units to be retained | property	40		40
345 Franklin | Residential buildings | NERA 50%
Total units/ condominiums
Total | property	40		40
Hamilton 1025
LIABILITIES AND PARTNERS' CAPITAL
Partners' Capital % - NERA							50.00%
Investment in Unconsolidated Joint Ventures							$ 2,352,000
Total units/ condominiums
Total | item							176
Units to be retained | item	(4)						(49)
Units sold | item	8	10					127
Unsold units | item	30
Hamilton 1025 | NERA 50%
ASSETS
Rental Properties	$ 2,812,552		$ 4,829,662
Cash & Cash Equivalents	684		288
Rent Receivable	10,842		18,732
Real Estate Tax Escrow			83,537
Prepaid Expenses & Other Assets	770,237		68,884
Total Assets	3,594,315		5,001,103
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable			4,693,693
Accounts Payable and Accrued Expenses	10,978		28,749
Advance Rental Payments and Security Deposits	42,231		89,470
Total Liabilities	53,209		4,811,912
Partners' Capital	3,541,106		189,191
Total Liabilities and Capital	$ 3,594,315		$ 5,001,103
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 1,770,552		$ 94,595
Total units/ condominiums
Total | property	176		176
Units to be retained | property	1		49
Units to be sold | property	175		127
Units sold | property	148		127
Unsold units | property	27
Units unsold with deposits for future sale | property	4
Hamilton 1025 | Residential buildings | NERA 50%
Total units/ condominiums
Total | property	175		175
Hamilton 1025 | Commercial | NERA 50%
Total units/ condominiums
Total | property	1		1
Hamilton Bay Sales | NERA 50%
ASSETS
Rental Properties	$ 0		$ 241,741
Cash & Cash Equivalents	212,237		28,695
Rent Receivable	825		2,400
Prepaid Expenses & Other Assets	0		1,891
Total Assets	213,062		274,727
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable and Accrued Expenses	1,182		1,395
Advance Rental Payments and Security Deposits	101		2,373
Total Liabilities	1,283		3,768
Partners' Capital	211,779		270,959
Total Liabilities and Capital	$ 213,062		$ 274,727
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 105,889		$ 135,479
Total units/ condominiums
Total | property	120		120
Units to be sold | property	120		120
Units sold | property	120		118
Unsold units | property			2
Hamilton Bay Sales | Residential buildings | NERA 50%
Total units/ condominiums
Total | property	120		120
Hamilton Bay Apts
LIABILITIES AND PARTNERS' CAPITAL
Partners' Capital % - NERA					50.00%
Investment in Unconsolidated Joint Ventures					$ 2,500,000
Total units/ condominiums
Total | item					168
Units to be retained | item					(48)
Units sold | item					120
Hamilton Bay Apts | NERA 50%
ASSETS
Rental Properties	$ 4,484,449		$ 6,017,735
Cash & Cash Equivalents	58,078		4,943
Rent Receivable	18,180		12,257
Real Estate Tax Escrow	0		37,780
Prepaid Expenses & Other Assets	487,987		74,021
Total Assets	5,048,694		6,146,736
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable			4,463,701
Accounts Payable and Accrued Expenses	35,122		9,232
Advance Rental Payments and Security Deposits	65,705		98,765
Total Liabilities	100,827		4,571,698
Partners' Capital	4,947,867		1,575,038
Total Liabilities and Capital	$ 5,048,694		$ 6,146,736
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 2,473,933		$ 787,518
Total units/ condominiums
Total | property	48		48
Units to be retained | property			48
Units to be sold | property	48
Units sold | property	10
Unsold units | property	38
Units unsold with deposits for future sale | property	9
Hamilton Bay Apts | Residential buildings | NERA 50%
Total units/ condominiums
Total | property	48		48
Hamilton Minuteman
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	$ 5,883,726
Partners' Capital % - NERA								50.00%
Investment in Unconsolidated Joint Ventures								$ 5,075,000
Total units/ condominiums
Total | item								42
Hamilton Minuteman | NERA 50%
ASSETS
Rental Properties	6,012,338		$ 6,200,372
Cash & Cash Equivalents	27,620		170
Rent Receivable	10,991
Real Estate Tax Escrow	19,216		46,263
Prepaid Expenses & Other Assets	23,196		159,492
Total Assets	6,093,361		6,406,297
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	5,883,726		5,169,696
Accounts Payable and Accrued Expenses	48,956		57,401
Advance Rental Payments and Security Deposits	119,247		110,976
Total Liabilities	6,051,929		5,338,073
Partners' Capital	41,432		1,068,224
Total Liabilities and Capital	$ 6,093,361		$ 6,406,297
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 20,716		$ 534,111
Total units/ condominiums
Total | property	42		42
Units to be retained | property	42		42
Hamilton Minuteman | Residential buildings | NERA 50%
Total units/ condominiums
Total | property	42		42
Hamilton on Main Apts
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	$ 16,784,966
Partners' Capital % - NERA									50.00%
Investment in Unconsolidated Joint Ventures									$ 8,000,000
Total units/ condominiums
Total | item									280
Units sold | item									137
Hamilton on Main Apts | NERA 50%
ASSETS
Rental Properties	17,871,657		$ 18,146,220
Cash & Cash Equivalents	541		172,519
Rent Receivable	20,212		13,230
Real Estate Tax Escrow	238,391		37,745
Prepaid Expenses & Other Assets	108,507		109,424
Total Assets	18,239,308		18,479,138
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	16,784,966		16,768,914
Accounts Payable and Accrued Expenses	140,046		130,506
Advance Rental Payments and Security Deposits	377,911		357,657
Total Liabilities	17,302,923		17,257,077
Partners' Capital	936,385		1,222,061
Total Liabilities and Capital	$ 18,239,308		$ 18,479,138
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 468,192		$ 611,031
Total units/ condominiums
Total | property	148		148
Units to be retained | property	148		148
Hamilton on Main Apts | Residential buildings | NERA 50%
Total units/ condominiums
Total | property	148		148
Dexter Park
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	$ 82,621,527
Partners' Capital % - NERA				40.00%
Investment in Unconsolidated Joint Ventures				$ 15,925,000
Total units/ condominiums
Total | item				409
Dexter Park | NERA 40%
ASSETS
Rental Properties	90,669,576		$ 93,105,409
Cash & Cash Equivalents	975,232		1,096,874
Rent Receivable	150,399		81,431
Real Estate Tax Escrow	273,553		233,654
Prepaid Expenses & Other Assets	1,667,709		2,132,688
Total Assets	93,736,469		96,650,056
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	82,621,527		84,018,197
Accounts Payable and Accrued Expenses	642,256		636,852
Advance Rental Payments and Security Deposits	3,412,120		3,027,025
Total Liabilities	86,675,903		87,682,074
Partners' Capital	7,060,566		8,967,982
Total Liabilities and Capital	$ 93,736,469		$ 96,650,056
Partners' Capital % - NERA	40.00%		40.00%
Investment in Unconsolidated Joint Ventures	$ 2,824,225		$ 3,587,193
Total units/ condominiums
Total | property	409		409
Units to be retained | property	409		409
Dexter Park | Residential buildings | NERA 40%
Total units/ condominiums
Total | property	409		409