RENTAL INCOME (Details)	6 Months Ended
	Jun. 30, 2015 USD ($) ft² item	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Minimum future rental income
2016	$ 2,639,000
2017	1,877,000
2018	1,444,000
2019	1,062,000
2020	475,000
Thereafter	603,000
Commercial Property Leases	8,100,000
Annual base rent for expiring leases	$ 2,986,703
Total square feet for expiring leases | ft²	108,043
Total number of leases expiring | item	44
Percentage of annual base rent for expiring leases	100.00%
Allowance for doubtful rent receivable	$ 452,000		$ 366,000
Recognizing rental income from non-cancelable commercial leases with future rental increases on a straight-line basis	168,000
Deferred rental concession	109,000
Amortization of deferred rents	$ 1,100
Percentage of rental income related to residential apartments and condominium units with leases of one year or less	92.00%
Maximum period of non-cancelable operating lease	1 year
Percentage of rental income related to commercial properties	8.00%
Aggregate contingent rentals from continuing operations	$ 345,000	$ 315,000
Through March 31, 2016
Minimum future rental income
Annual base rent for expiring leases	$ 864,371
Total square feet for expiring leases | ft²	38,641
Total number of leases expiring | item	11
Percentage of annual base rent for expiring leases	29.00%
Through March 31, 2017
Minimum future rental income
Annual base rent for expiring leases	$ 525,725
Total square feet for expiring leases | ft²	18,157
Total number of leases expiring | item	7
Percentage of annual base rent for expiring leases	18.00%
Through March 31, 2018
Minimum future rental income
Annual base rent for expiring leases	$ 408,902
Total square feet for expiring leases | ft²	13,175
Total number of leases expiring | item	9
Percentage of annual base rent for expiring leases	14.00%
Through March 31, 2019
Minimum future rental income
Annual base rent for expiring leases	$ 211,965
Total square feet for expiring leases | ft²	6,626
Total number of leases expiring | item	5
Percentage of annual base rent for expiring leases	7.00%
Through March 31, 2020
Minimum future rental income
Annual base rent for expiring leases	$ 753,497
Total square feet for expiring leases | ft²	24,873
Total number of leases expiring | item	10
Percentage of annual base rent for expiring leases	25.00%
Through March 31, 2021
Minimum future rental income
Annual base rent for expiring leases	$ 64,800
Total square feet for expiring leases | ft²	1,800
Total number of leases expiring | item	1
Percentage of annual base rent for expiring leases	2.00%
Through March 31, 2024
Minimum future rental income
Annual base rent for expiring leases	$ 157,443
Total square feet for expiring leases | ft²	4,771
Total number of leases expiring | item	1
Percentage of annual base rent for expiring leases	5.00%