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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]      
Operating leases expense $ 1,400 $ 1,400 $ 1,400
2018 594    
2019 366    
2020 344    
2021 344    
2022 and thereafter 431    
Total $ 2,079