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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of the required periodic payments including both interest and principal payments.

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MORTGAGE NOTES PAYABLE (Details) - 10Q (USD $)	3 Months Ended		0 Months Ended		1 Months Ended	0 Months Ended
MORTGAGE NOTES PAYABLE (Details) - 10Q (USD $)	Mar. 31, 2015	Mar. 31, 2014	Jul. 31, 2014	Jun. 11, 2014	Feb. 28, 2014	Jul. 11, 2014
MORTGAGE NOTES PAYABLE
Effective interest rate (as a percent)	5.36%
Annual maturities of mortgage debt
2015-current maturities	$ 285,000
2016	1,439,000
2017	1,801,000
2018	7,880,000
2019	1,963,000
Thereafter	182,671,000
Total	196,039,000us-gaap_LongTermDebt
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months	285,000
Additional disclosures related to mortgages
Amount of new loan	8,076,000us-gaap_ProceedsFromIssuanceOfDebt
Repurchase of depository receipts	975,731
Repurchase of units	809	271
Line of Credit
Additional disclosures related to mortgages
Term of debt			3 years
Maximum borrowings			25,000,000
Funds drawn by the company	0
Number of properties in which borrowing amount collateralized			23
Amount of refinancing costs			125,000
Base Rate [Member] \| Line of Credit
Additional disclosures related to mortgages
Reference rate used in calculation of Base Rate			base
Prime Rate [Member] \| Line of Credit
Additional disclosures related to mortgages
Reference rate used in calculation of Base Rate			Prime
Federal Funds Rate [Member] \| Line of Credit
Additional disclosures related to mortgages
Basis of effective interest rate used in calculation of Base Rate (as a percent)			0.50%
Reference rate used in calculation of Base Rate			Federal Funds
London Interbank Offered Rate (LIBOR) [Member] \| Line of Credit
Additional disclosures related to mortgages
Basis of effective interest rate used in calculation of Base Rate (as a percent)			1.00%
Reference rate used in calculation of Base Rate			one month LIBOR
Minimum \| Line of Credit
Additional disclosures related to mortgages
Commitment fee for unused amount (as a percent)			0.15%
Pledged interests rate of the Partnership's ownership interest (as a percent)			49.00%
Minimum \| Base Rate [Member] \| Line of Credit
Additional disclosures related to mortgages
Debt Instrument, Basis Spread on Variable Rate			2.50%
Maximum \| Line of Credit
Additional disclosures related to mortgages
Commitment fee for unused amount (as a percent)			0.20%
Pledged interests rate of the Partnership's ownership interest (as a percent)			100.00%
Maximum \| Base Rate [Member] \| Line of Credit
Additional disclosures related to mortgages
Debt Instrument, Basis Spread on Variable Rate			3.50%
Mortgages payable
MORTGAGE NOTES PAYABLE
Amount of monthly installments including principal	808,000
Weighted average interest rate (as a percent)	4.81%
Effective interest rate (as a percent)	4.93%
Mortgages payable \| NERA Dean Street Associates, LLC
MORTGAGE NOTES PAYABLE
Interest rate (as a percent)				4.22%
Additional disclosures related to mortgages
Amount of new loan				5,687,000
Period of interest only payments on loans				10 years
Amount of loan proceeds utilized for pay off the existing mortgage				5,077,000
Refinancing cost				89,000
Mortgages payable \| Hamilton Linewt LLC Commercial-1031Exchange Newton, Massachusetts
Additional disclosures related to mortgages
Amount of mortgage paid off					1,466,000
Mortgages payable \| Linhart L.P. Residential/Commercial Newton, Massachusetts
Additional disclosures related to mortgages
Amount of mortgage paid off					1,926,000
Mortgages payable \| Courtyard At Westgate Residential Units Burlington Massachusetts Member
MORTGAGE NOTES PAYABLE
Interest rate (as a percent)						4.31%
Additional disclosures related to mortgages
Period of interest only payments on loans						10 years
Amount of loan proceeds utilized for pay off the existing mortgage						2,010,000
Amount of new loan						2,500,000
Amount of refinancing costs						$ 75,000
Mortgages payable \| Minimum
MORTGAGE NOTES PAYABLE
Interest rate (as a percent)	3.76%
Mortgages payable \| Maximum
MORTGAGE NOTES PAYABLE
Interest rate (as a percent)	5.97%