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RELATED PARTY TRANSACTIONS (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2017
USD ($)
Director
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Beneficial Ownership [Member]      
Related Party Transaction [Line Items]      
Expenses paid by the company to related parties $ 468 $ 448 $ 441
Number of board of directors | Director 2    
Beneficial Ownership [Member] | Minimum [Member]      
Related Party Transaction [Line Items]      
Ownership percentage 50.00%    
Board of Directors [Member]      
Related Party Transaction [Line Items]      
Rent expense $ 52 $ 52 $ 52
Entity With Partial Ownership by the Chairman of the Board [Member]      
Related Party Transaction [Line Items]      
Ownership percentage 20.00%    
Entity With Partial Ownership by another Member of the Board [Member]      
Related Party Transaction [Line Items]      
Ownership percentage 20.00%