Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Disaggregation of Revenues (Details)

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Summary of Significant Accounting Policies - Disaggregation of Revenues (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Disaggregation of Revenue [Line Items]    
Operating Lease, Lease Income, Lease Payments $ 11,330 $ 12,062
Non-lease revenues 72 219
Total 14,847 15,728
Credit losses on operating lease receivables (119) (154)
Total Revenue 14,728 15,574
Tenant reimbursements - variable lease revenue    
Disaggregation of Revenue [Line Items]    
Variable lease revenue 3,093 3,288
Percentage rent - variable lease revenue    
Disaggregation of Revenue [Line Items]    
Variable lease revenue 129 108
Straight-line rents    
Disaggregation of Revenue [Line Items]    
Operating Lease, Lease Income, Lease Payments 223 51
Lease termination fees    
Disaggregation of Revenue [Line Items]    
Non-lease revenues 4 62
Other    
Disaggregation of Revenue [Line Items]    
Non-lease revenues $ 68 $ 157