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BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES- Accounts Receivable and Deferred Rent Asset (Details)
12 Months Ended
Dec. 31, 2020
tenant
Concentration Risk [Line Items]  
Number of tenants 1
Customer Concentration Risk | Sales Revenue, Net  
Concentration Risk [Line Items]  
Concentration risk, percentage 55.00%
Number of tenants 3