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INTANGIBLE ASSETS (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Less: accumulated amortization $ (1,442) $ (1,442)
Purchased technology, net 5 6
Goodwill 185 185
Intangibles 190 191
Purchased Technology    
Finite-Lived Intangible Assets [Line Items]    
Purchased technology (5-17 year lives) $ 1,447 $ 1,448
Purchased Technology | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Intangible asset, useful life (in years) 5 years  
Purchased Technology | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Intangible asset, useful life (in years) 17 years