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Financial Income (Expenses), Net (Tables)
 12 Months Ended
Dec. 31, 2013
Financial Income (Expenses), Net [Abstract]  
Financial Income (Expenses), Net
 
  
Year ended December 31
  
 
  
2011
    
2012
    
2013
  
 
  
US$ thousands
  
 
  
 
    
 
    
 
  
Interest income
     1,292       1,360       1,290  
Interest expenses
     (499 )     (561 )     (643 )
Exchange rate differences, net
     (231 )     96       (89 )
Bank charges
     (123 )     (143 )     (154 )
 
                        
 
     439       752       404