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COMMITMENTS AND CONTINGENCIES (Lease Cost) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Lease Cost          
Amortization of right-of-use assets $ 6 $ 5 $ 11 $ 10  
Interest on lease obligation 0 0 1 1  
Total finance lease cost 6 5 12 11  
Total operating lease cost 107 99 213 201  
Short-term lease cost 119 141 246 254  
Total lease cost 232 245 471 466  
Cash paid for amounts included in the measurement of lease obligation:          
Operating cash flows from operating leases 107 98 213 199  
Financing cash flows from finance leases 6 5 11 10  
Right-of-use assets obtained in exchange for new finance lease obligations 0 0 0 0  
Right-of-use assets obtained in exchange for new operating lease obligations $ 0 26 $ 0 26  
Weighted average remaining lease term for operating leases 4 years 2 months 12 days   4 years 2 months 12 days   4 years 7 months 6 days
Weighted average remaining lease term for finance leases 1 year 2 months 12 days   1 year 2 months 12 days   1 year 10 months 24 days
Weighted average discount rate for operating leases 3.20%   3.20%   3.20%
Weighted average discount rate for finance leases 4.00%   4.00%   4.00%
Boniface Engineering, Ltd.          
Lease Cost          
Total lease cost $ 57 45 $ 113 102  
Jige International S.A.          
Lease Cost          
Total lease cost $ 28 $ 26 $ 56 $ 56