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WARRANTIES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
WARRANTIES [Abstract]    
Beginning balance $ 656 $ 858
Warranty provisions 71 123
Warranty claims (81) (74)
Adjustments to preexisting warranties (333) (251)
Ending balance $ 313 $ 656