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Note 2. Summary of Significant Accounting Policies (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Note 2. Summary of Significant Accounting Policies (Details) [Line Items]      
Goodwill, Impairment Loss $ 0 $ 0  
Research and Development Expense $ 1,791,000 $ 1,740,000 $ 1,502,000
Research and Development Expense as Percentage of Annual Sales 3.10% 3.40% 3.50%
Machinery and Equipment [Member] | Minimum [Member]
     
Note 2. Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 5 years    
Machinery and Equipment [Member] | Maximum [Member]
     
Note 2. Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 15 years    
Software Development [Member] | Minimum [Member]
     
Note 2. Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 3 years    
Software Development [Member] | Maximum [Member]
     
Note 2. Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 7 years