RENTAL INCOME (Commercial Leases) (Details)	3 Months Ended
	Mar. 31, 2021 USD ($) ft² item
RENTAL INCOME
Annual base rent for expiring leases | $	$ 2,726,276
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 | $	$ 1,065,898
Total square feet for expiring leases | ft²	59,415
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 | $	$ 221,861
Total square feet for expiring leases | ft²	6,392
Total number of leases expiring | item	6
Percentage of annual base rent for expiring leases	8.00%
2023
RENTAL INCOME
Annual base rent for expiring leases | $	$ 672,213
Total square feet for expiring leases | ft²	19,432
Total number of leases expiring | item	9
Percentage of annual base rent for expiring leases	25.00%
2024
RENTAL INCOME
Annual base rent for expiring leases | $	$ 395,806
Total square feet for expiring leases | ft²	14,868
Total number of leases expiring | item	8
Percentage of annual base rent for expiring leases	15.00%
2025
RENTAL INCOME
Annual base rent for expiring leases | $	$ 204,708
Total square feet for expiring leases | ft²	3,473
Total number of leases expiring | item	4
Percentage of annual base rent for expiring leases	7.00%
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%