Annual report pursuant to Section 13 and 15(d)

COMMITMENTS AND CONTINGENCIES (Details)

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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]      
Operating leases expense $ 1,700 $ 1,400 $ 1,400
2019 892    
2020 721    
2021 721    
2022 721    
2023 and thereafter 2,258    
Total $ 5,313