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NOTE RECEIVABLES (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Net carrying amount $ 6,853 $ 6,671
Equity Method Investee | Convertible Note Receivable    
Debt Instrument [Line Items]    
Principal amount 6,650 6,650
Unamortized discount (751) (977)
Net carrying amount 5,899 5,673
Equity Method Investee | Notes Receivable    
Debt Instrument [Line Items]    
Principal amount 9,000 0
Unamortized discount (269) 0
Net carrying amount $ 8,731 $ 0