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LEASES - As Lessor - Lease Termination Fees (Details) - USD ($)
1 Months Ended 12 Months Ended
Jan. 31, 2021
Dec. 31, 2020
Retail tenants    
Lease Termination Fee    
Payments received upon early lease termination $ 350,000  
Industrial tenants    
Lease Termination Fee    
Payments received upon early lease termination   $ 88,000