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MARKETABLE SECURITIES (Tables)
 12 Months Ended
Dec. 31, 2017
Marketable Securities [Abstract]  
Schedule of Marketable Securities
The following is a summary of the Company's investment in marketable securities:

   
December 31, 2017
    
December 31, 2016
  
         
Gross unrealized
    
Gross unrealized
    
Fair
          
Gross unrealized
    
Gross unrealized
    
Fair
  
   
Cost
    
gains
    
Losses
    
value
    
Cost
    
gains
    
losses
    
value
  
Available-for-sale:
                                                
                                                 
Equity securities
  
$
244
    
$
317
    
$
-
    
$
561
    
$
491
    
$
420
    
$
-
    
$
911
  
                                                                 
   
$
244
    
$
317
    
$
-
    
$
561
    
$
491
    
$
420
    
$
-
    
$
911