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FAIR VALUE (Details) - Recurring basis - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Level 1    
ASSETS    
Cash equivalents $ 11,947 $ 18,319
Financial instrument associated with stock purchase agreement    
Total assets $ 11,947 $ 18,319
Level 2    
ASSETS    
Cash equivalents    
Financial instrument associated with stock purchase agreement $ 26 $ 51
Total assets $ 26 $ 51
Level 3    
ASSETS    
Cash equivalents    
Financial instrument associated with stock purchase agreement    
Total assets    
Total    
ASSETS    
Cash equivalents $ 11,947 $ 18,319
Financial instrument associated with stock purchase agreement 26 51
Total assets $ 11,973 $ 18,370