RENTAL INCOME (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
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
2017	$ 2,697,000
2018	2,248,000
2019	1,687,000
2020	1,396,000
2021	570,000
Thereafter	313,000
Commercial Property Leases	8,911,000
Aggregate contingent rentals from continuing operations	$ 495,000	$ 444,000