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SHORT-TERM BORROWINGS (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Short-term Debt [Line Items]    
Line of Credit Facility, Maximum Amount Outstanding During Period $ 4,800  
Line of Credit Facility, Interest Rate Description 0.75  
Short-term Debt, Total $ 0 $ 4,268
Revolving Credit Facility [Member]    
Short-term Debt [Line Items]    
Line of Credit Facility, Amount, Total $ 60,000  
Line of Credit Facility, Expiration Date Nov. 04, 2018  
Short-term Debt, Total   $ 4,300
Debt Instrument, Interest Rate, Effective Percentage   1.52%