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LEASE OBLIGATIONS - Lease costs (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
LEASE OBLIGATIONS    
Operating lease costs $ 1,763 $ 898
Finance lease cost:    
Interest on lease liabilities 7  
Amortization of right-of-use 183  
Net lease cost $ 1,953 $ 898