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EQUIPMENT LOANS (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Statement [Line Items]    
Less: Future interest charges $ (1) $ (12)
Present value of loan payments 72 289
Less: Current portion (72) (199)
Non-current portion 0 90
Not later than one year [member]    
Statement [Line Items]    
Contractual maturities 73 228
Later Than One Year And Not Later Than Five Years [Member]    
Statement [Line Items]    
Non-current portion 0  
Contractual maturities $ 0 $ 73