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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2015
Accounting Policies [Abstract]  
Depreciation of Property, Plant and Equipment
Property, plant and equipment are stated at cost, net of accumulated depreciation. Depreciation is calculated on the straight-line basis over the estimated useful life of the assets at the following annual rates:
 
   
%
  
Machinery and equipment
     15 - 33  
Office furniture and equipment
     6 - 33  
Leasehold improvements
     10 - 20  
Computation of Basic and Diluted Income Per Ordinary Share
The following table summarizes information related to the computation of basic and diluted income per ordinary share for the years indicated.
 
   
Year ended December 31
  
   
2013
    
2014
    
2015
  
Net income attributable to ordinary shares
                  
 (US$ thousands)
     17,077       14,605       16,520  
                         
Weighted average number of ordinary shares outstanding
                        
 used in basic income per ordinary share calculation
     7,103,021       7,184,114       7,268,536  
                         
Add assumed exercise of outstanding dilutive potential
                        
 ordinary shares
     143,011       134,792       99,448  
                         
Weighted average number of ordinary shares outstanding
                        
 used in diluted income per ordinary share calculation
     7,246,032       7,318,906       7,367,984  
                         
Basic income per ordinary shares (US$)
     2.404       2.033       2.273  
                         
Diluted income per ordinary shares (US$)
     2.357       1.996       2.242  
                         
The weighted average number of shares related  to options
                        
 and RSUs excluded from the diluted earnings per share
                        
 calculation because of anti-dilutive effect
     -       37,304       43,181