RENTAL INCOME (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 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	$ 2,565,000
2021	2,299,000
2022	1,591,000
2023	946,000
2024	523,000
Thereafter	756,000
Commercial Property Leases	8,680,000
Aggregate contingent rentals from continuing operations	$ 129,000	$ 223,000