RENTAL INCOME (Details) - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 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	$ 2,720,000
2019	2,251,000
2020	2,071,000
2021	1,164,000
2022	737,000
Thereafter	977,000
Commercial Property Leases	9,920,000
Aggregate contingent rentals from continuing operations	$ 449,000	$ 319,000