RENTAL INCOME (Commercial Leases) (Details)	6 Months Ended
	Jun. 30, 2021 USD ($) ft² item
RENTAL INCOME
Annual base rent for expiring leases | $	$ 2,684,575
Total square feet for expiring leases | ft²	108,154
Total number of leases expiring | item	49
Percentage of annual base rent for expiring leases	100.00%
2021
RENTAL INCOME
Annual base rent for expiring leases | $	$ 1,011,281
Total square feet for expiring leases | ft²	59,188
Total number of leases expiring | item	20
Percentage of annual base rent for expiring leases	39.00%
2022
RENTAL INCOME
Annual base rent for expiring leases | $	$ 428,967
Total square feet for expiring leases | ft²	11,761
Total number of leases expiring | item	8
Percentage of annual base rent for expiring leases	16.00%
2023
RENTAL INCOME
Annual base rent for expiring leases | $	$ 491,548
Total square feet for expiring leases | ft²	14,668
Total number of leases expiring | item	8
Percentage of annual base rent for expiring leases	18.00%
2024
RENTAL INCOME
Annual base rent for expiring leases | $	$ 414,562
Total square feet for expiring leases | ft²	14,674
Total number of leases expiring | item	7
Percentage of annual base rent for expiring leases	15.00%
2025
RENTAL INCOME
Annual base rent for expiring leases | $	$ 172,427
Total square feet for expiring leases | ft²	3,289
Total number of leases expiring | item	4
Percentage of annual base rent for expiring leases	6.00%
2026
RENTAL INCOME
Annual base rent for expiring leases | $	$ 23,340
Total square feet for expiring leases | ft²	724
Total number of leases expiring | item	1
Percentage of annual base rent for expiring leases	1.00%
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%