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Sales (Tables)
12 Months Ended
Dec. 31, 2012
Sales [Abstract]  
Sales By Geographic Region
   
Year ended December 31
 
   
2010
   
2011
   
2012
 
   
US$ thousands
 
North America
    22,071       29,627       33,606  
Europe
    4,174       5,174       7,277  
Rest of the world
    4,154       4,832       7,846  
                         
      30,399       39,633       48,729  
Sales To Single Customers Exceeding 10% Of Sales