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Summary Of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2012
Summary Of Significant Accounting Policies [Abstract]  
Depreciation Of Property, Plant And Equipment
   
%
  
Machinery and equipment
     15- 33  
Office furniture and equipment
     6- 33  
Leasehold improvements
     10- 20  
Computation Of Basic And Diluted Income Per Ordinary Share
   
Year ended December 31
  
   
2010
    
2011
    
2012
  
Net income attributable to ordinary shares
                  
  (US$ thousands)
     5,715       8,243       9,871  
                         
Weighted average number of ordinary shares outstanding
                        
  used in basic income per ordinary share calculation
     6,820,721       6,896,215       6,933,576  
                         
Add assumed exercise of outstanding dilutive potential
                        
  ordinary shares
     117,735       98,377       34,729  
                         
Weighted average number of ordinary shares outstanding
                        
  used in diluted income per ordinary share calculation
     6,938,456       6,994,592       6,968,305  
                         
Basic income per ordinary shares (US$)
     0.838       1.195       1.424  
                         
Diluted income per ordinary shares (US$)
     0.824       1.178       1.417  
                         
Number of options and warrants excluded
                        
  from the diluted earnings per share calculation
                        
  because of anti-dilutive effect
     137,500       135,000       135,000