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Inventories (Tables)
12 Months Ended
Dec. 31, 2015
Inventory Disclosure [Abstract]  
Summary of Inventories
 
December 31
 
   
2014
   
2015
 
   
US$ thousands
 
             
Raw materials and components
    8,275       9,598  
Products in process
    11,263       9,013  
Finished products
    5,911       7,710  
      25,449       26,321