MORTGAGE NOTES PAYABLE (Mortgages Payable) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
MORTGAGE NOTES PAYABLE
Effective interest rate (as a percent)	5.08%
Financing fees, net	$ 0	$ 28,000
Accumulated amortization on financing and leasing fees	141,000	113,000
Annual maturities of mortgage debt
2017-current maturities	1,823,000
2018	7,903,000
2019	4,324,000
2020	2,312,000
2021	2,561,000
Thereafter	216,153,000
Total	235,076,000
Less: unamortized deferred financing costs	(1,461,000)
Secured Debt	233,615,499	212,709,080
Mortgages payable
MORTGAGE NOTES PAYABLE
Amount of monthly installments including principal	$ 1,060,000
Weighted average interest rate (as a percent)	4.59%
Effective interest rate (as a percent)	4.67%
Financing fees, net	$ 1,461,000	1,454,000
Accumulated amortization on financing and leasing fees	$ 1,226,000	$ 1,061,000
Mortgages payable | Minimum
MORTGAGE NOTES PAYABLE
Interest rate (as a percent)	3.24%
Mortgages payable | Maximum
MORTGAGE NOTES PAYABLE
Interest rate (as a percent)	5.97%