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RELATED PARTY TRANSACTIONS - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Related Party Transaction [Line Items]    
Note payable issued   $ 100
Co-venturer    
Related Party Transaction [Line Items]    
Purchases from supplier $ 1,441 2,643
Due to supplier $ 38 $ 29