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Inventories (Tables)
6 Months Ended
Jun. 30, 2017
Inventory Disclosure [Abstract]  
Summary of Inventories
 
   
June 30,
   
December 31,
 
   
2017
   
2016
 
   
US$ thousands
 
             
Raw materials and components
   
22,442
     
16,435
 
Products in process
   
19,366
     
19,098
 
Finished products
   
9,551
     
8,747
 
     
51,359
     
44,280