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Notes Receivable - Components (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Notes receivable activities    
Notes receivable loan loss reserve $ (139) $ (146)
Total 13,730 14,465
Mezzanine loan    
Notes receivable activities    
Mezzanine loan 7,461 8,445
Other loans    
Notes receivable activities    
Mezzanine loan $ 6,408 $ 6,166