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INVENTORIES (Tables)
 12 Months Ended
Dec. 31, 2018
INVENTORIES [Abstract]  
Components of Inventories
The components of inventories are as follows:


  
December 31,
 
  
2018
  
2017
 
Raw materials
 
$
63,348
  
$
46,712
 
Work in progress
  
21,441
   
17,688
 
Finished goods
  
35,279
   
43,319
 
Inventories
 
$
120,068
  
$
107,719