INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Balance Sheet) (Details)	Dec. 31, 2016 USD ($) item	Feb. 01, 2016 item	Dec. 31, 2015 USD ($) item	Feb. 01, 2015 item	Dec. 31, 2014 USD ($) item	Oct. 28, 2009 USD ($)	Mar. 02, 2005 USD ($) item	Sep. 30, 2004 USD ($) item	Aug. 31, 2004 USD ($) item	Nov. 30, 2001 USD ($) item
ASSETS
Rental Properties	$ 142,881,344		$ 148,681,873		$ 153,973,241
Cash & Cash Equivalents	2,081,578		1,873,377		1,554,873
Rent Receivable	265,073		96,371		153,693
Real Estate Tax Escrow	612,537		513,139		642,780
Prepaid Expenses & Other Assets	2,361,142		2,282,252		2,445,524
Total Assets	148,201,674		153,447,012		158,770,111
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	130,152,298				137,317,724
Accounts Payable and Accrued Expenses	1,033,761		1,254,230		1,169,702
Advance Rental Payments and Security Deposits	3,736,609		3,541,179		3,197,700
Total Liabilities	134,922,668		140,453,398		141,685,126
Partners' Capital	13,279,006		12,993,614		17,084,985
Total Liabilities and Capital	148,201,674		153,447,012		158,770,111
Investment in Unconsolidated Joint Ventures	8,336,505		7,819,162		8,807,868
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	(2,577,606)		(2,288,090)		$ (1,425,369)
Total Investment in Unconsolidated Joint Ventures (Net)	5,758,899		$ 5,531,072
Total units/ condominiums
Total | item					1,033
Units to be retained | item					786
Units to be sold | item					247
Units sold | item					240
Unsold units | item					7
NERA 50%
LIABILITIES AND PARTNERS' CAPITAL
Investment in Unconsolidated Joint Ventures	$ 8,336,505
Residential buildings
Total units/ condominiums
Total | item					1,030
Commercial
Total units/ condominiums
Total | item					3
Investment Properties
Total units/ condominiums
Total | item	1,033		1,033
Units to be retained | item	689		786
Units to be sold | item	344		247
Units sold | item		258		242
Unsold units | item		38		5
Units unsold with deposits for future sale | item		6	2
Investment Properties | Residential buildings
Total units/ condominiums
Total | item	1,030		1,030
Investment Properties | Commercial
Total units/ condominiums
Total | item	3		3
Hamilton Essex 81
ASSETS
Rental Properties	$ 8,011,942		$ 8,419,054		$ 8,732,134
Cash & Cash Equivalents	167,953		200,185		759
Rent Receivable	25,604		9,058		44,399
Real Estate Tax Escrow	127,728		33,643		105,474
Prepaid Expenses & Other Assets	96,307		104,975		83,881
Total Assets	8,429,534		8,766,915		8,966,647
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	9,879,346				8,079,567
Accounts Payable and Accrued Expenses	59,227		69,413		49,426
Advance Rental Payments and Security Deposits	218,582		202,470		174,186
Total Liabilities	10,157,155		10,137,440		8,303,179
Partners' Capital	(1,727,621)		(1,370,525)		663,468
Total Liabilities and Capital	8,429,534		$ 8,766,915		$ 8,966,647
Partners' Capital % - NERA			50.00%		50.00%
Investment in Unconsolidated Joint Ventures					$ 331,734
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (863,810)		$ (685,263)
Total units/ condominiums
Total | item	49		49		49
Units to be retained | item	49		49		49
Hamilton Essex 81 | NERA 50%
LIABILITIES AND PARTNERS' CAPITAL
Partners' Capital % - NERA	50.00%
Hamilton Essex 81 | Residential buildings
Total units/ condominiums
Total | item	48		48		48
Hamilton Essex 81 | Commercial
Total units/ condominiums
Total | item	1		1		1
Hamilton Essex Development
ASSETS
Rental Properties	$ 2,622,011		$ 2,618,666		$ 2,621,495
Cash & Cash Equivalents	52,321		16,036		4,216
Prepaid Expenses & Other Assets	615		565		559
Total Assets	2,674,947		2,635,267		2,626,270
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable					1,982,191
Accounts Payable and Accrued Expenses	1,700		1,700		6,088
Total Liabilities	1,700		1,700		1,988,279
Partners' Capital	2,673,247		2,633,567		637,991
Total Liabilities and Capital	$ 2,674,947		$ 2,635,267		$ 2,626,270
Partners' Capital % - NERA			50.00%		50.00%
Investment in Unconsolidated Joint Ventures					$ 318,995
Total units/ condominiums
Total | item	1		1		1
Units to be retained | item	1		1		1
Hamilton Essex Development | NERA 50%
LIABILITIES AND PARTNERS' CAPITAL
Partners' Capital % - NERA	50.00%
Investment in Unconsolidated Joint Ventures	$ 1,336,623		$ 1,316,782
Hamilton Essex Development | Commercial
Total units/ condominiums
Total | item	1		1		1
345 Franklin
ASSETS
Rental Properties	$ 6,587,662		$ 6,780,019		$ 7,132,916
Cash & Cash Equivalents	57,635		160,086		111,875
Rent Receivable	9,840		3,738		2,116
Real Estate Tax Escrow	18,570		15,322		17,731
Prepaid Expenses & Other Assets	50,553		37,088		36,911
Total Assets	6,724,260		6,996,253		7,301,549
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	9,849,225				9,910,110
Accounts Payable and Accrued Expenses	65,948		63,268		51,122
Advance Rental Payments and Security Deposits	236,679		221,871		191,054
Total Liabilities	10,151,852		10,201,908		10,152,286
Partners' Capital	(3,427,592)		(3,205,655)		(2,850,737)
Total Liabilities and Capital	$ 6,724,260		$ 6,996,253		$ 7,301,549
Partners' Capital % - NERA			50.00%		50.00%					50.00%
Investment in Unconsolidated Joint Ventures										$ 1,533,000
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture			$ (1,602,828)		$ (1,425,369)
Total units/ condominiums
Total | item	40		40		40					40
Units to be retained | item	40		40		40
345 Franklin | NERA 50%
LIABILITIES AND PARTNERS' CAPITAL
Partners' Capital % - NERA	50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (1,713,796)
345 Franklin | Residential buildings
Total units/ condominiums
Total | item	40		40		40
Hamilton 1025
ASSETS
Rental Properties	$ 3,706,705		$ 4,939,620		$ 5,156,752
Cash & Cash Equivalents	144,831		27,721		23,008
Rent Receivable	10,568		4,164		2,111
Real Estate Tax Escrow			80,196		75,027
Prepaid Expenses & Other Assets	403,514		56,048		45,705
Total Assets	4,265,618		5,107,749		5,302,603
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable					4,796,446
Accounts Payable and Accrued Expenses	9,432		28,736		28,751
Advance Rental Payments and Security Deposits	61,883		91,649		96,142
Total Liabilities	71,315		4,849,136		4,921,339
Partners' Capital	4,194,303		258,613		381,264
Total Liabilities and Capital	$ 4,265,618		$ 5,107,749		$ 5,302,603
Partners' Capital % - NERA			50.00%		50.00%		50.00%
Investment in Unconsolidated Joint Ventures					$ 190,632		$ 2,352,000
Total units/ condominiums
Total | item	176		176		176		176
Units to be retained | item			48		49
Units to be sold | item	176		127		127
Units sold | item	10	139		127	127
Unsold units | item		37
Units unsold with deposits for future sale | item		5
Hamilton 1025 | NERA 50%
LIABILITIES AND PARTNERS' CAPITAL
Partners' Capital % - NERA	50.00%
Investment in Unconsolidated Joint Ventures	$ 2,097,151		$ 129,305
Hamilton 1025 | Residential buildings
Total units/ condominiums
Total | item	175		175		175
Hamilton 1025 | Commercial
Total units/ condominiums
Total | item	1		1		1
Hamilton Bay Sales
ASSETS
Rental Properties	$ 140,635		$ 573,138		$ 811,043
Cash & Cash Equivalents	18,576		7,728		28,636
Rent Receivable	2,452				1,770
Prepaid Expenses & Other Assets	1,540		12,879		198,603
Total Assets	163,203		593,745		1,040,052
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable and Accrued Expenses	3,137		12,605		21,454
Advance Rental Payments and Security Deposits	1,822		5,799		10,999
Total Liabilities	4,959		18,404		32,453
Partners' Capital	158,244		575,341		1,007,599
Total Liabilities and Capital	$ 163,203		$ 593,745		$ 1,040,052
Partners' Capital % - NERA			50.00%		50.00%
Investment in Unconsolidated Joint Ventures					$ 503,800
Total units/ condominiums
Total | item	120		120		120
Units to be sold | item	120		120		120
Units sold | item		119		115	113
Unsold units | item		1		5	7
Units unsold with deposits for future sale | item		1	2
Hamilton Bay Sales | NERA 50%
LIABILITIES AND PARTNERS' CAPITAL
Partners' Capital % - NERA	50.00%
Investment in Unconsolidated Joint Ventures	$ 79,122		$ 287,670
Hamilton Bay Sales | Residential buildings
Total units/ condominiums
Total | item	120		120		120
Hamilton Bay Apts
ASSETS
Rental Properties	$ 5,929,749		$ 6,174,512		$ 6,416,511
Cash & Cash Equivalents	923		545		32,379
Rent Receivable	5,520		241		945
Real Estate Tax Escrow	47,308		51,218		46,978
Prepaid Expenses & Other Assets	79,474		63,345		46,290
Total Assets	6,062,974		6,289,861		6,543,103
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	4,430,574				4,560,483
Accounts Payable and Accrued Expenses	12,277		14,594		10,193
Advance Rental Payments and Security Deposits	82,693		95,552		99,043
Total Liabilities	4,525,544		4,607,329		4,669,719
Partners' Capital	1,537,430		1,682,532		1,873,384
Total Liabilities and Capital	$ 6,062,974		$ 6,289,861		$ 6,543,103
Partners' Capital % - NERA			50.00%		50.00%
Investment in Unconsolidated Joint Ventures					$ 936,692
Total units/ condominiums
Total | item	48		48		48
Units to be retained | item			48		48
Units to be sold | item	48
Hamilton Bay Apts | NERA 50%
LIABILITIES AND PARTNERS' CAPITAL
Partners' Capital % - NERA	50.00%
Investment in Unconsolidated Joint Ventures	$ 768,714		$ 841,265
Hamilton Bay Apts | Residential buildings
Total units/ condominiums
Total | item	48		48		48
Hamilton Minuteman
ASSETS
Rental Properties	$ 6,165,266		$ 6,352,363		$ 6,551,038
Cash & Cash Equivalents	47,795		39,184		66,705
Rent Receivable			668
Real Estate Tax Escrow	18,198		40,499		40,532
Prepaid Expenses & Other Assets	26,473		41,201		44,736
Total Assets	6,257,732		6,473,915		6,703,011
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	5,879,634				5,284,499
Accounts Payable and Accrued Expenses	50,643		55,116		52,095
Advance Rental Payments and Security Deposits	120,096		113,084		95,642
Total Liabilities	6,050,373		5,377,020		5,432,236
Partners' Capital	207,359		1,096,895		1,270,775
Total Liabilities and Capital	$ 6,257,732		$ 6,473,915		$ 6,703,011
Partners' Capital % - NERA			50.00%		50.00%			50.00%
Investment in Unconsolidated Joint Ventures					$ 635,388			$ 5,075,000
Total units/ condominiums
Total | item	42		42		42			42
Units to be retained | item	42		42		42
Hamilton Minuteman | NERA 50%
LIABILITIES AND PARTNERS' CAPITAL
Partners' Capital % - NERA	50.00%
Investment in Unconsolidated Joint Ventures	$ 103,679		$ 548,446
Hamilton Minuteman | Residential buildings
Total units/ condominiums
Total | item	42		42		42
Hamilton on Main Apts
ASSETS
Rental Properties	$ 17,773,858		$ 18,574,474		$ 19,408,575
Cash & Cash Equivalents	95,294		235,748		158,515
Rent Receivable	6,133		11,684		7,495
Real Estate Tax Escrow	189,239		81,815		62,290
Prepaid Expenses & Other Assets	75,324		67,496		71,703
Total Assets	18,139,848		18,971,217		19,708,578
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	16,776,940				16,744,838
Accounts Payable and Accrued Expenses	157,812		216,091		156,578
Advance Rental Payments and Security Deposits	347,446		328,675		305,809
Total Liabilities	17,282,198		17,305,655		17,207,225
Partners' Capital	857,650		1,665,562		2,501,353
Total Liabilities and Capital	$ 18,139,848		$ 18,971,217		$ 19,708,578
Partners' Capital % - NERA			50.00%		50.00%				50.00%
Investment in Unconsolidated Joint Ventures					$ 1,250,676				$ 8,000,000
Total units/ condominiums
Total | item	148		148		148				280
Units to be retained | item	148		148		148
Hamilton on Main Apts | NERA 50%
LIABILITIES AND PARTNERS' CAPITAL
Partners' Capital % - NERA	50.00%
Investment in Unconsolidated Joint Ventures	$ 428,824		$ 832,780
Hamilton on Main Apts | Residential buildings
Total units/ condominiums
Total | item	148		148		148
Dexter Park
ASSETS
Rental Properties	$ 91,943,516		$ 94,250,027		$ 97,142,777
Cash & Cash Equivalents	1,496,250		1,186,144		1,128,780
Rent Receivable	204,956		66,818		94,857
Real Estate Tax Escrow	211,494		210,446		294,748
Prepaid Expenses & Other Assets	1,627,342		1,898,655		1,917,136
Total Assets	95,483,558		97,612,090		100,578,298
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	83,336,579				85,959,590
Accounts Payable and Accrued Expenses	673,585		792,707		793,995
Advance Rental Payments and Security Deposits	2,667,408		2,482,079		2,224,825
Total Liabilities	86,677,572		87,954,806		88,978,410
Partners' Capital	8,805,986		9,657,284		11,599,888
Total Liabilities and Capital	$ 95,483,558		$ 97,612,090		$ 100,578,298
Partners' Capital % - NERA			40.00%		40.00%	40.00%
Investment in Unconsolidated Joint Ventures					$ 4,639,953	$ 15,925,000
Total units/ condominiums
Total | item	409		409		409
Units to be retained | item	409		409		409
Dexter Park | NERA 40%
LIABILITIES AND PARTNERS' CAPITAL
Partners' Capital % - NERA	40.00%
Investment in Unconsolidated Joint Ventures	$ 3,522,393		$ 3,862,914
Dexter Park | Residential buildings
Total units/ condominiums
Total | item	409		409		409