RENTAL INCOME (Details) - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
RENTAL INCOME
Percentage of rental income related to residential apartments and condominium units with leases of one year or less	93.00%
Maximum period of non-cancelable operating lease	1 year
Percentage of rental income related to commercial properties	7.00%
Minimum future rental income
2018	$ 2,613,000
2019	2,185,000
2020	1,879,000
2021	1,040,000
2022	622,000
Thereafter	872,000
Commercial Property Leases	9,211,000
Aggregate contingent rentals from continuing operations	$ 632,000	$ 495,000