MORTGAGE NOTES PAYABLE AND LINE OF CREDIT (Line of Credit) (Details)				1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 07, 2016	Sep. 30, 2015	Jul. 31, 2014 USD ($) item	Aug. 31, 2014	Mar. 31, 2016 USD ($)	Dec. 31, 2005 item	Mar. 07, 2005 item
Line of Credit
Line Of Credit Facility Unused Capacity Commitment Fee					$ 12,000
Hamilton Essex 81
Line of Credit
Number of properties in which borrowing amount collateralized | item							1
Line of Credit
Line of Credit
Maximum borrowings			$ 25,000,000
Term of debt			3 years
Amount of refinancing costs			$ 125,000
Funds drawn by the company					0
Number of properties in which borrowing amount collateralized | item			23
Base Rate | Line of Credit
Line of Credit
Reference rate used in calculation of Base Rate			base
Prime Rate [Member] | Line of Credit
Line of Credit
Reference rate used in calculation of Base Rate			Prime
Federal Funds Rate | Line of Credit
Line of Credit
Reference rate used in calculation of Base Rate			Federal Funds
Basis of effective interest rate used in calculation of Base Rate (as a percent)			0.50%
LIBOR | Residences at CaptainParkers LLC Residential Apartments Lexington, Massachusetts
Line of Credit
Margin over basis of interest rate (as a percent)	201.00%
LIBOR | Line of Credit
Line of Credit
Reference rate used in calculation of Base Rate			one month LIBOR
Basis of effective interest rate used in calculation of Base Rate (as a percent)			1.00%
Minimum
Line of Credit
Tangible net worth					$ 150,000,000
Ratio of net operating income to total indebtedness					9.50%
Debt service coverage ratio					1.6
Minimum | Line of Credit
Line of Credit
Pledged interests of the Partnership's ownership interest (as a percent)			49.00%
Commitment fee for unused amount (as a percent)			0.15%
Minimum | Base Rate | Line of Credit
Line of Credit
Margin over basis of interest rate (as a percent)			2.50%
Maximum
Line of Credit
Leverage ratio					65.00%
Aggregate increase in indebtedness					$ 15,000,000
Maximum | Line of Credit
Line of Credit
Pledged interests of the Partnership's ownership interest (as a percent)			100.00%
Commitment fee for unused amount (as a percent)			0.20%
Mortgages payable | Hamilton Essex 81
Line of Credit
Term of debt		10 years
Mortgages payable | Hamilton on Main Apartments, LLC
Line of Credit
Term of debt				10 years		10 years
Number of properties in which borrowing amount collateralized | item						3
Mortgages payable | LIBOR | Hamilton Essex 81
Line of Credit
Margin over basis of interest rate (as a percent)		2.18%