RENTAL INCOME (Commercial Leases) (Details)	9 Months Ended
	Sep. 30, 2021 USD ($) ft² item
RENTAL INCOME
Annual base rent for expiring leases | $	$ 2,578,786
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%
2022
RENTAL INCOME
Annual base rent for expiring leases | $	$ 975,407
Total square feet for expiring leases | ft²	61,058
Total number of leases expiring | item	21
Percentage of annual base rent for expiring leases	38.00%
2023
RENTAL INCOME
Annual base rent for expiring leases | $	$ 300,556
Total square feet for expiring leases | ft²	9,894
Total number of leases expiring | item	6
Percentage of annual base rent for expiring leases	11.00%
2024
RENTAL INCOME
Annual base rent for expiring leases | $	$ 778,079
Total square feet for expiring leases | ft²	26,033
Total number of leases expiring | item	12
Percentage of annual base rent for expiring leases	30.00%
2025
RENTAL INCOME
Annual base rent for expiring leases | $	$ 135,210
Total square feet for expiring leases | ft²	2,461
Total number of leases expiring | item	4
Percentage of annual base rent for expiring leases	5.00%
2026
RENTAL INCOME
Annual base rent for expiring leases | $	$ 247,084
Total square feet for expiring leases | ft²	4,858
Total number of leases expiring | item	5
Percentage of annual base rent for expiring leases	10.00%
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	6.00%