INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Balance Sheet) (Details)	Mar. 31, 2017 USD ($) property item	Dec. 31, 2016 USD ($) item	Mar. 31, 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	$ 9,955,145	$ 8,336,505
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	(2,636,410)	$ (2,577,606)
Investment Properties
ASSETS
Rental Properties	141,066,471		$ 147,408,613
Cash & Cash Equivalents	2,423,420		1,586,477
Rent Receivable	203,506		128,548
Real Estate Tax Escrow	656,876		497,248
Prepaid Expenses & Other Assets	2,090,797		2,463,770
Total Assets	146,441,070		152,084,656
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	125,320,159		135,277,998
Accounts Payable and Accrued Expenses	980,329		1,070,460
Advance Rental Payments and Security Deposits	3,853,054		3,759,860
Total Liabilities	130,153,542		140,108,318
Partners' Capital	16,287,528		11,976,338
Total Liabilities and Capital	146,441,070		152,084,656
Investment in Unconsolidated Joint Ventures	9,955,145		7,440,487
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	(2,636,410)		(2,384,811)
Total Investment in Unconsolidated Joint Ventures (Net)	$ 7,318,735		$ 5,055,676
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	264		244
Unsold units | property	79		3
Units unsold with deposits for future sale | property	14
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	$ 9,882,793
Total units/ condominiums
Total | item						48
Hamilton Essex 81 | NERA 50%
ASSETS
Rental Properties	7,907,838		$ 8,334,464
Cash & Cash Equivalents	158,945		99,760
Rent Receivable	17,373		64,319
Real Estate Tax Escrow	119,722		33,350
Prepaid Expenses & Other Assets	96,193		154,594
Total Assets	8,300,071		8,686,487
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	9,882,793		9,869,004
Accounts Payable and Accrued Expenses	48,972		56,759
Advance Rental Payments and Security Deposits	232,421		210,924
Total Liabilities	10,164,186		10,136,687
Partners' Capital	(1,864,115)		(1,450,200)
Total Liabilities and Capital	$ 8,300,071		$ 8,686,487
Partners' Capital % - NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (932,058)		$ (725,100)
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	$ 2,622,729		$ 2,617,959
Cash & Cash Equivalents	50,621		49,336
Prepaid Expenses & Other Assets	246		226
Total Assets	2,673,596		2,667,521
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable			0
Accounts Payable and Accrued Expenses	623		426
Total Liabilities	623		426
Partners' Capital	2,672,973		2,667,095
Total Liabilities and Capital	$ 2,673,596		$ 2,667,521
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 1,336,486		$ 1,333,547
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	$ 9,805,791
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	6,542,738		$ 6,693,104
Cash & Cash Equivalents	70,277		125,764
Rent Receivable	3,496		2,253
Real Estate Tax Escrow	45,948		40,392
Prepaid Expenses & Other Assets	45,250		31,233
Total Assets	6,707,709		6,892,746
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	9,805,791		9,918,433
Accounts Payable and Accrued Expenses	84,711		77,758
Advance Rental Payments and Security Deposits	225,911		215,976
Total Liabilities	10,116,413		10,212,167
Partners' Capital	(3,408,704)		(3,319,421)
Total Liabilities and Capital	$ 6,707,709		$ 6,892,746
Partners' Capital % - NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (1,704,352)		$ (1,659,711)
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	(2)						(49)
Units sold | item	6	10					127
Unsold units | item	30
Hamilton 1025 | NERA 50%
ASSETS
Rental Properties	$ 3,029,735		$ 4,882,565
Cash & Cash Equivalents	490,522		14,124
Rent Receivable	12,438		4,274
Real Estate Tax Escrow			81,742
Prepaid Expenses & Other Assets	131,148		58,033
Total Assets	3,663,843		5,040,738
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable			4,710,990
Accounts Payable and Accrued Expenses	15,600		24,052
Advance Rental Payments and Security Deposits	49,544		102,088
Total Liabilities	65,144		4,837,130
Partners' Capital	3,598,699		203,608
Total Liabilities and Capital	$ 3,663,843		$ 5,040,738
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 1,799,349		$ 101,803
Total units/ condominiums
Total | property	176		176
Units to be retained | property			49
Units to be sold | property	175		127
Units sold | property	143		127
Unsold units | property	32
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	$ 145,134		$ 357,803
Cash & Cash Equivalents	88		126,576
Rent Receivable	225		1,520
Prepaid Expenses & Other Assets	16,480		18,370
Total Assets	161,927		504,269
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable and Accrued Expenses	2,330		13,187
Advance Rental Payments and Security Deposits	101		2,362
Total Liabilities	2,431		15,549
Partners' Capital	159,496		488,720
Total Liabilities and Capital	$ 161,927		$ 504,269
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 79,748		$ 244,359
Total units/ condominiums
Total | property	120		120
Units to be sold | property	120		120
Units sold | property	120		117
Unsold units | property			3
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	$ 5,848,498		$ 6,095,119
Cash & Cash Equivalents	17,718		11,116
Rent Receivable	5,844		3,612
Real Estate Tax Escrow	17,849		44,499
Prepaid Expenses & Other Assets	103,595		66,580
Total Assets	5,993,504		6,220,926
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable			4,480,571
Accounts Payable and Accrued Expenses	5,782		9,900
Advance Rental Payments and Security Deposits	75,660		99,093
Total Liabilities	81,442		4,589,564
Partners' Capital	5,912,062		1,631,362
Total Liabilities and Capital	$ 5,993,504		$ 6,220,926
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 2,956,030		$ 815,680
Total units/ condominiums
Total | property	48		48
Units to be retained | property			48
Units to be sold | property	48
Units sold | property	1
Unsold units | property	47
Units unsold with deposits for future sale | property	10
Hamilton Bay Apts | Residential buildings | NERA 50%
Total units/ condominiums
Total | property	48		48
Hamilton Minuteman
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	$ 5,881,680
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	6,095,634		$ 6,273,766
Cash & Cash Equivalents	60,393		60,710
Rent Receivable	1,152		75
Real Estate Tax Escrow	19,048		43,381
Prepaid Expenses & Other Assets	31,844		39,366
Total Assets	6,208,071		6,417,298
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	5,881,680		5,189,002
Accounts Payable and Accrued Expenses	61,455		63,090
Advance Rental Payments and Security Deposits	124,719		117,749
Total Liabilities	6,067,854		5,369,841
Partners' Capital	140,217		1,047,457
Total Liabilities and Capital	$ 6,208,071		$ 6,417,298
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 70,108		$ 523,728
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	$ 16,780,953
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	17,593,862		$ 18,357,260
Cash & Cash Equivalents	214,895		129,070
Rent Receivable	11,479		14,814
Real Estate Tax Escrow	213,815		37,745
Prepaid Expenses & Other Assets	107,642		96,529
Total Assets	18,141,693		18,635,418
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	16,780,953		16,764,902
Accounts Payable and Accrued Expenses	153,499		151,830
Advance Rental Payments and Security Deposits	380,586		335,850
Total Liabilities	17,315,038		17,252,582
Partners' Capital	826,655		1,382,836
Total Liabilities and Capital	$ 18,141,693		$ 18,635,418
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 413,327		$ 691,418
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	$ 82,968,942
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	91,280,303		$ 93,796,573
Cash & Cash Equivalents	1,359,961		970,021
Rent Receivable	151,499		37,681
Real Estate Tax Escrow	240,494		216,139
Prepaid Expenses & Other Assets	1,558,399		1,998,839
Total Assets	94,590,656		97,019,253
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	82,968,942		84,345,096
Accounts Payable and Accrued Expenses	607,357		673,458
Advance Rental Payments and Security Deposits	2,764,112		2,675,818
Total Liabilities	86,340,411		87,694,372
Partners' Capital	8,250,245		9,324,881
Total Liabilities and Capital	$ 94,590,656		$ 97,019,253
Partners' Capital % - NERA	40.00%		40.00%
Investment in Unconsolidated Joint Ventures	$ 3,300,097		$ 3,729,952
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