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INVENTORIES (Tables)
 12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
Schedule of Product Information [Table Text Block]
 
 
December 31,
 
 
 
2016
 
2017
 
 
 
 
 
 
 
 
 
Raw materials
 
$
5,779
 
$
5,146
 
Finished products
 
 
10,554
 
 
11,417
 
 
 
 
 
 
 
 
 
 
 
$
16,333
 
$
16,563