RENTAL INCOME (Commercial Leases) (Details)	9 Months Ended
	Sep. 30, 2018 USD ($) ft² item
RENTAL INCOME
Annual base rent for expiring leases | $	$ 2,905,127
Total square feet for expiring leases | ft²	108,043
Total number of leases expiring | item	46
Percentage of annual base rent for expiring leases	100.00%
Through December 31, 2019
RENTAL INCOME
Annual base rent for expiring leases | $	$ 564,242
Total square feet for expiring leases | ft²	27,747
Total number of leases expiring | item	17
Percentage of annual base rent for expiring leases	19.00%
Through December 31, 2020
RENTAL INCOME
Annual base rent for expiring leases | $	$ 165,607
Total square feet for expiring leases | ft²	4,033
Total number of leases expiring | item	5
Percentage of annual base rent for expiring leases	6.00%
Through December 31, 2021
RENTAL INCOME
Annual base rent for expiring leases | $	$ 856,606
Total square feet for expiring leases | ft²	36,895
Total number of leases expiring | item	9
Percentage of annual base rent for expiring leases	29.00%
Through December 31, 2022
RENTAL INCOME
Annual base rent for expiring leases | $	$ 519,523
Total square feet for expiring leases | ft²	16,343
Total number of leases expiring | item	6
Percentage of annual base rent for expiring leases	18.00%
Through December 31, 2023
RENTAL INCOME
Annual base rent for expiring leases | $	$ 405,072
Total square feet for expiring leases | ft²	12,546
Total number of leases expiring | item	6
Percentage of annual base rent for expiring leases	14.00%
Through December 31, 2024
RENTAL INCOME
Annual base rent for expiring leases | $	$ 251,627
Total square feet for expiring leases | ft²	6,629
Total number of leases expiring | item	2
Percentage of annual base rent for expiring leases	9.00%
Through December 31, 2029
RENTAL INCOME
Annual base rent for expiring leases | $	$ 142,450
Total square feet for expiring leases | ft²	3,850
Total number of leases expiring | item	1
Percentage of annual base rent for expiring leases	5.00%