RENTAL INCOME (Commercial Leases) (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) ft² item
RENTAL INCOME
Annual base rent for expiring leases | $	$ 2,712,907
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 | $	$ 840,146
Total square feet for expiring leases | ft²	54,821
Total number of leases expiring | item	19
Percentage of annual base rent for expiring leases	31.00%
2022
RENTAL INCOME
Annual base rent for expiring leases | $	$ 522,454
Total square feet for expiring leases | ft²	13,380
Total number of leases expiring | item	8
Percentage of annual base rent for expiring leases	19.00%
2023
RENTAL INCOME
Annual base rent for expiring leases | $	$ 451,560
Total square feet for expiring leases | ft²	13,871
Total number of leases expiring | item	7
Percentage of annual base rent for expiring leases	17.00%
2024
RENTAL INCOME
Annual base rent for expiring leases | $	$ 623,739
Total square feet for expiring leases | ft²	20,709
Total number of leases expiring | item	11
Percentage of annual base rent for expiring leases	23.00%
2025
RENTAL INCOME
Annual base rent for expiring leases | $	$ 132,558
Total square feet for expiring leases | ft²	1,523
Total number of leases expiring | item	3
Percentage of annual base rent for expiring leases	5.00%
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%