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STOCK BASED COMPENSATION, SHARE-BASED COMPENSATION (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Stock options        
Stock-based compensation (in dollars) $ 68 $ 150 $ 135 $ 456
Stock Options        
Stock options        
Stock-based compensation (in dollars) $ 43   $ 84  
Expected term     10 years  
Vesting period     48 months