RENTAL INCOME (Details) - USD ($)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
RENTAL INCOME
Percentage of rental income related to residential apartments and condominium units with leases of one year or less	94.00%
Maximum period of non-cancelable operating lease	1 year
Percentage of rental income related to commercial properties	6.00%
Minimum future rental income
2020	$ 2,799,000
2021	2,595,000
2022	1,674,000
2023	1,229,000
2024	698,000
Thereafter	742,000
Commercial Property Leases	9,737,000
Aggregate contingent rentals from continuing operations	$ 277,000	$ 449,000