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INCOME TAXES (Detail Textuals) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Tax Credit Carryforward [Line Items]      
Income tax expense (benefit) of continuing operations $ 2,085 $ (536) $ 2,672
U.S. statutory rate 34.00% 34.00% 34.00%
Reversal of reserve for uncertain tax positions   $ 1,914  
Income taxes on pre-tax income based on the U.S. statutory rate   1,400  
Total income tax expense     $ 2,700
Uncertain tax positions $ 700    
Tax benefits to additional paid-in capital 701 $ 554 $ 1,247
Federal | Research and development tax credits      
Tax Credit Carryforward [Line Items]      
Net federal credit carryforwards $ 4,800