INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Balance Sheet) (Details)	Sep. 30, 2016 USD ($) property	Dec. 31, 2015 USD ($)	Sep. 30, 2015 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	$ 8,970,289	$ 7,819,162
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	(2,481,546)	$ (2,288,090)
Investment Properties
ASSETS
Rental Properties	144,074,716		$ 149,963,482
Cash & Cash Equivalents	1,875,141		1,547,689
Rent Receivable	431,805		139,874
Real Estate Tax Escrow	1,221,204		651,669
Prepaid Expenses & Other Assets	2,446,530		2,472,810
Total Assets	150,049,396		154,775,524
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	130,551,992		136,031,781
Accounts Payable and Accrued Expenses	1,080,567		1,219,501
Advance Rental Payments and Security Deposits	3,615,158		3,348,213
Total Liabilities	135,247,717		140,599,495
Partners' Capital	14,801,679		14,176,029
Total Liabilities and Capital	150,049,396		154,775,524
Investment in Unconsolidated Joint Ventures	8,970,289		8,299,289
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	(2,481,546)		(2,212,081)
Total Investment in Unconsolidated Joint Ventures (Net)	$ 6,488,743		$ 6,087,208
Total units/ condominiums
Total | property	1,033		1,033
Units to be retained | property	689		786
Units to be sold | property	344		247
Units sold | property	252		241
Unsold units | property	44		6
Units unsold with deposits for future sale | property	3		1
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	$ 9,875,898
Total units/ condominiums
Total | item						48
Hamilton Essex 81 | NERA 50%
ASSETS
Rental Properties	8,129,487		$ 8,511,004
Cash & Cash Equivalents	142,274		73,595
Rent Receivable	49,547		40,921
Real Estate Tax Escrow	81,827		104,165
Prepaid Expenses & Other Assets	172,746		121,531
Total Assets	8,575,881		8,851,216
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	9,875,898		9,862,109
Accounts Payable and Accrued Expenses	59,117		60,815
Advance Rental Payments and Security Deposits	225,843		185,386
Total Liabilities	10,160,858		10,108,310
Partners' Capital	(1,584,977)		(1,257,094)
Total Liabilities and Capital	$ 8,575,881		$ 8,851,216
Partners' Capital % - NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (792,488)		$ (628,547)
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	$ 2,616,545		$ 2,619,374
Cash & Cash Equivalents	52,323		81,236
Prepaid Expenses & Other Assets	982		903
Total Assets	2,669,850		2,701,513
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable and Accrued Expenses	1,275		1,133
Total Liabilities	1,275		1,133
Partners' Capital	2,668,575		2,700,380
Total Liabilities and Capital	$ 2,669,850		$ 2,701,513
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 1,334,288		$ 1,350,188
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	$ 9,892,225
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	6,521,385		$ 6,859,314
Cash & Cash Equivalents	199,544		79,265
Rent Receivable	18,009		8,582
Real Estate Tax Escrow	45,014		42,400
Prepaid Expenses & Other Assets	54,156		45,606
Total Assets	6,838,108		7,035,167
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	9,892,225		9,915,104
Accounts Payable and Accrued Expenses	78,095		83,754
Advance Rental Payments and Security Deposits	245,904		203,378
Total Liabilities	10,216,224		10,202,236
Partners' Capital	(3,378,116)		(3,167,069)
Total Liabilities and Capital	$ 6,838,108		$ 7,035,167
Partners' Capital % - NERA	50.00%		50.00%
Distribution and Loss in Excess of investments in Unconsolidated Joint Venture	$ (1,689,058)		$ (1,583,534)
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							(49)
Units sold	6						127
Unsold units | property	48
Hamilton 1025 | NERA 50%
ASSETS
Rental Properties	$ 4,074,383		$ 4,997,692
Cash & Cash Equivalents	155,921		1,029
Rent Receivable	35,302		4,272
Real Estate Tax Escrow	659,841		75,984
Prepaid Expenses & Other Assets			55,877
Total Assets	4,925,447		5,134,854
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable			4,746,249
Accounts Payable and Accrued Expenses	51,206		21,998
Advance Rental Payments and Security Deposits	79,732		95,656
Total Liabilities	130,938		4,863,903
Partners' Capital	4,794,509		270,951
Total Liabilities and Capital	$ 4,925,447		$ 5,134,854
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 2,397,254		$ 135,476
Total units/ condominiums
Total | property	176		176
Units to be retained | property			49
Units to be sold | property	176		127
Units sold | property	133		127
Unsold units | property	43
Units unsold with deposits for future sale | property	3
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	$ 124,752		$ 672,579
Cash & Cash Equivalents	97,332		8,171
Rent Receivable	3,000		100
Real Estate Tax Escrow	171
Prepaid Expenses & Other Assets			211,856
Total Assets	225,255		892,706
LIABILITIES AND PARTNERS' CAPITAL
Accounts Payable and Accrued Expenses	3,947		23,055
Advance Rental Payments and Security Deposits	2,380		5,695
Total Liabilities	6,327		28,750
Partners' Capital	218,928		863,956
Total Liabilities and Capital	$ 225,255		$ 892,706
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 109,464		$ 431,978
Total units/ condominiums
Total | property	120		120
Units to be sold | property	120		120
Units sold | property	119		114
Unsold units | property	1		6
Units unsold with deposits for future sale | property			1
Hamilton Bay Sales | Residential buildings | NERA 50%
Total units/ condominiums
Total | property	120		120
Hamilton Bay Apts
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	$ 4,447,269
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	5,956,617		$ 6,212,058
Cash & Cash Equivalents	1,121		3,998
Rent Receivable	15,687		2,820
Real Estate Tax Escrow	44,049		55,215
Prepaid Expenses & Other Assets	78,234		60,886
Total Assets	6,095,708		6,334,977
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	4,447,269		4,512,848
Accounts Payable and Accrued Expenses	9,809		6,934
Advance Rental Payments and Security Deposits	93,716		86,897
Total Liabilities	4,550,794		4,606,679
Partners' Capital	1,544,914		1,728,298
Total Liabilities and Capital	$ 6,095,708		$ 6,334,977
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 772,457		$ 864,149
Total units/ condominiums
Total | property	48		48
Units to be retained | property			48
Units to be sold | property	48
Hamilton Bay Apts | Residential buildings | NERA 50%
Total units/ condominiums
Total | property	48		48
Hamilton Minuteman
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	$ 5,877,338
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	6,206,120		$ 6,371,641
Cash & Cash Equivalents	89,502		60,545
Rent Receivable	980		692
Real Estate Tax Escrow	37,762		39,403
Prepaid Expenses & Other Assets	67,687		39,742
Total Assets	6,402,051		6,512,023
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	5,877,338		5,228,371
Accounts Payable and Accrued Expenses	42,713		59,805
Advance Rental Payments and Security Deposits	112,168		107,428
Total Liabilities	6,032,219		5,395,604
Partners' Capital	369,832		1,116,419
Total Liabilities and Capital	$ 6,402,051		$ 6,512,023
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 184,916		$ 558,210
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	$ 16,772,927
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	17,972,191		$ 18,785,662
Cash & Cash Equivalents	100,273		216,613
Rent Receivable	20,473		12,320
Real Estate Tax Escrow	135,659		91,842
Prepaid Expenses & Other Assets	94,299		84,849
Total Assets	18,322,895		19,191,286
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	16,772,927		16,756,876
Accounts Payable and Accrued Expenses	140,981		207,573
Advance Rental Payments and Security Deposits	361,929		314,676
Total Liabilities	17,275,837		17,279,125
Partners' Capital	1,047,058		1,912,161
Total Liabilities and Capital	$ 18,322,895		$ 19,191,286
Partners' Capital % - NERA	50.00%		50.00%
Investment in Unconsolidated Joint Ventures	$ 523,529		$ 956,080
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	$ 83,686,335
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	92,473,236		$ 94,934,158
Cash & Cash Equivalents	1,036,851		1,023,237
Rent Receivable	288,807		70,167
Real Estate Tax Escrow	216,881		242,660
Prepaid Expenses & Other Assets	1,978,426		1,851,560
Total Assets	95,994,201		98,121,782
LIABILITIES AND PARTNERS' CAPITAL
Mortgage Notes Payable	83,686,335		85,010,224
Accounts Payable and Accrued Expenses	693,424		754,434
Advance Rental Payments and Security Deposits	2,493,486		2,349,097
Total Liabilities	86,873,245		88,113,755
Partners' Capital	9,120,956		10,008,027
Total Liabilities and Capital	$ 95,994,201		$ 98,121,782
Partners' Capital % - NERA	40.00%		40.00%
Investment in Unconsolidated Joint Ventures	$ 3,648,382		$ 4,003,209
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