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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Other Commitments [Line Items]    
Purchase commitments $ 1,900  
Required capital contribution $ 357 $ 357
Pending Litigation    
Other Commitments [Line Items]    
Total loss contingency accrued   1,000
Cost accrued   $ 820
Largest Customer | Sales | Customer Concentration Risk    
Other Commitments [Line Items]    
Concentration receivable risk 10.00% 11.00%
China joint venture    
Other Commitments [Line Items]    
Remaining payments to acquire interest in joint venture $ 203