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STOCK BASED COMPENSATION (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Stock-based compensation        
Stock-based compensation costs before income taxes $ 192 $ 141 $ 614 $ 464
General and administrative        
Stock-based compensation        
Stock-based compensation costs before income taxes 113 97 376 312
Research and development        
Stock-based compensation        
Stock-based compensation costs before income taxes $ 79 $ 44 $ 238 $ 152