RENTAL INCOME (Commercial Leases) (Details)	3 Months Ended
	Mar. 31, 2019 USD ($) ft² item
RENTAL INCOME
Annual base rent for expiring leases | $	$ 2,887,127
Total square feet for expiring leases | ft²	106,683
Total number of leases expiring | item	45
Percentage of annual base rent for expiring leases	100.00%
Through March 31, 2020
RENTAL INCOME
Annual base rent for expiring leases | $	$ 454,412
Total square feet for expiring leases | ft²	22,400
Total number of leases expiring | item	12
Percentage of annual base rent for expiring leases	16.00%
Through March 31, 2021
RENTAL INCOME
Annual base rent for expiring leases | $	$ 225,337
Total square feet for expiring leases | ft²	5,679
Total number of leases expiring | item	7
Percentage of annual base rent for expiring leases	8.00%
Through March 31, 2022
RENTAL INCOME
Annual base rent for expiring leases | $	$ 1,143,867
Total square feet for expiring leases | ft²	47,854
Total number of leases expiring | item	10
Percentage of annual base rent for expiring leases	39.00%
Through March 31, 2023
RENTAL INCOME
Annual base rent for expiring leases | $	$ 246,341
Total square feet for expiring leases | ft²	7,087
Total number of leases expiring | item	4
Percentage of annual base rent for expiring leases	9.00%
Through March 31, 2024
RENTAL INCOME
Annual base rent for expiring leases | $	$ 658,784
Total square feet for expiring leases | ft²	19,209
Total number of leases expiring | item	8
Percentage of annual base rent for expiring leases	22.00%
Through March 31, 2025
RENTAL INCOME
Annual base rent for expiring leases | $	$ 15,936
Total square feet for expiring leases | ft²	604
Total number of leases expiring | item	3
Percentage of annual base rent for expiring leases	1.00%
Through March 31, 2030
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%