RENTAL INCOME (Commercial Leases) (Details)	6 Months Ended
	Jun. 30, 2018 USD ($) ft² item
RENTAL INCOME
Annual base rent for expiring leases | $	$ 2,989,362
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 | $	$ 303,325
Total square feet for expiring leases | ft²	13,980
Total number of leases expiring | item	12
Percentage of annual base rent for expiring leases	10.00%
Through December 31, 2020
RENTAL INCOME
Annual base rent for expiring leases | $	$ 500,471
Total square feet for expiring leases | ft²	17,383
Total number of leases expiring | item	9
Percentage of annual base rent for expiring leases	17.00%
Through December 31, 2021
RENTAL INCOME
Annual base rent for expiring leases | $	$ 686,602
Total square feet for expiring leases | ft²	27,388
Total number of leases expiring | item	8
Percentage of annual base rent for expiring leases	23.00%
Through December 31, 2022
RENTAL INCOME
Annual base rent for expiring leases | $	$ 579,290
Total square feet for expiring leases | ft²	23,267
Total number of leases expiring | item	6
Percentage of annual base rent for expiring leases	19.00%
Through December 31, 2023
RENTAL INCOME
Annual base rent for expiring leases | $	$ 397,553
Total square feet for expiring leases | ft²	10,507
Total number of leases expiring | item	6
Percentage of annual base rent for expiring leases	13.00%
Through December 31, 2024
RENTAL INCOME
Annual base rent for expiring leases | $	$ 379,671
Total square feet for expiring leases | ft²	11,668
Total number of leases expiring | item	4
Percentage of annual base rent for expiring leases	13.00%
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%