MORTGAGE NOTES PAYABLE (Mortgages Payable) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
MORTGAGE NOTES PAYABLE
Effective interest rate (as a percent)	3.98%
Financing fees, net	$ 100,000	$ 121,000
Accumulated amortization on financing and leasing fees	29,000	7,000
Annual maturities of mortgage debt
2019-current maturities	1,883,000
2020	4,321,000
2021	2,207,000
2022	2,632,000
2023	79,997,000
Thereafter	163,595,000
Total	254,635,000
Less: unamortized deferred financing costs	(1,450,000)
Secured Debt	253,185,372	233,221,258
Mortgages payable
MORTGAGE NOTES PAYABLE
Amount of monthly installments including principal	$ 1,120,000
Weighted average interest rate (as a percent)	4.56%
Effective interest rate (as a percent)	4.65%
Financing fees, net	$ 1,551,000	1,531,000
Accumulated amortization on financing and leasing fees	$ 1,166,000	$ 1,149,000
Mortgages payable | Minimum
MORTGAGE NOTES PAYABLE
Interest rate (as a percent)	3.76%
Mortgages payable | Maximum
MORTGAGE NOTES PAYABLE
Interest rate (as a percent)	5.81%