MORTGAGE NOTES PAYABLE (Line of Credit) (Details)					1 Months Ended	3 Months Ended		12 Months Ended
	Jan. 22, 2020 USD ($)	Dec. 20, 2019 USD ($)	Sep. 30, 2015	Jul. 31, 2014 USD ($) item	Aug. 31, 2014	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2005	Oct. 31, 2020 USD ($)	Dec. 19, 2019 USD ($)	Aug. 31, 2017 USD ($)	Mar. 07, 2005 item
Line of Credit
Interest expense						$ 3,364,170	$ 3,450,325
Line Of Credit Facility Unused Capacity Commitment Fee						3,000
Hamilton Essex 81
Line of Credit
Interest expense						61,312	$ 100,733
Number of properties in which borrowing amount collateralized | item												1
Minimum
Line of Credit
Tangible net worth						$ 150,000,000
Operating income to indebtedness ratio						9.50%
Debt service coverage ratio						1.6
Maximum
Line of Credit
Leverage ratio						65.00%
Aggregate increase in indebtedness						$ 15,000,000
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
Mortgages payable | LIBOR | Hamilton Essex 81
Line of Credit
Variable interest rate spread			2.18%
Line of Credit
Line of Credit
Maximum borrowings				$ 25,000,000
Term of debt				3 years
Loan amount										$ 20,000,000
Payment on line of credit	$ 1,000,000	$ 2,000,000
Amount of refinancing costs									$ 37,500		$ 128,000
Credit line balance						$ 17,000,000
Number of properties in which borrowing amount collateralized | item				23
Line of Credit | Federal Funds Rate
Line of Credit
Variable interest rate spread				0.50%
Line of Credit | LIBOR
Line of Credit
Additional applicable margin rate				2.50%
Variable interest rate spread				1.00%
Line of Credit | Minimum
Line of Credit
Pledged interest ownership percentage						49.00%
Commitment fee for unused amount (as a percent)				0.15%
Line of Credit | Maximum
Line of Credit
Pledged interest ownership percentage						100.00%
Commitment fee for unused amount (as a percent)				0.20%