RENTAL INCOME (Commercial Leases) (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) ft² item
RENTAL INCOME
Annual base rent for expiring leases | $	$ 2,898,984
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 December 31, 2019
RENTAL INCOME
Annual base rent for expiring leases | $	$ 459,408
Total square feet for expiring leases | ft²	22,120
Total number of leases expiring | item	11
Percentage of annual base rent for expiring leases	16.00%
Through December 31, 2020
RENTAL INCOME
Annual base rent for expiring leases | $	$ 232,198
Total square feet for expiring leases | ft²	5,959
Total number of leases expiring | item	8
Percentage of annual base rent for expiring leases	8.00%
Through December 31, 2021
RENTAL INCOME
Annual base rent for expiring leases | $	$ 835,995
Total square feet for expiring leases | ft²	40,586
Total number of leases expiring | item	7
Percentage of annual base rent for expiring leases	29.00%
Through December 31, 2022
RENTAL INCOME
Annual base rent for expiring leases | $	$ 554,214
Total square feet for expiring leases | ft²	14,355
Total number of leases expiring | item	7
Percentage of annual base rent for expiring leases	19.00%
Through December 31, 2023
RENTAL INCOME
Annual base rent for expiring leases | $	$ 444,280
Total square feet for expiring leases | ft²	13,591
Total number of leases expiring | item	6
Percentage of annual base rent for expiring leases	15.00%
Through December 31, 2024
RENTAL INCOME
Annual base rent for expiring leases | $	$ 230,439
Total square feet for expiring leases | ft²	6,222
Total number of leases expiring | item	5
Percentage of annual base rent for expiring leases	8.00%
Through December 31, 2025
RENTAL INCOME
Percentage of annual base rent for expiring leases	0.00%
Through December 31, 2026
RENTAL INCOME
Percentage of annual base rent for expiring leases	0.00%
Through December 31, 2027
RENTAL INCOME
Percentage of annual base rent for expiring leases	0.00%
Through December 31, 2028
RENTAL INCOME
Percentage of annual base rent for expiring leases	0.00%
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%
Through December 31, 2030
RENTAL INCOME
Percentage of annual base rent for expiring leases	0.00%