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Note 5 Goodwill, Intangible Assets and Long Term Assets Composition of Intangible Assets (Detail) (USD $)
Sep. 28, 2014
Dec. 31, 2013
Cost $ 12,713,000 $ 12,723,000
Accumulated amortization (8,300,000) (8,077,000)
Net 4,413,000 4,646,000
Trademarks
    
Cost 3,567,000  
Accumulated amortization 0  
Net 3,567,000  
Patents and technology
    
Cost 4,509,000  
Accumulated amortization (4,070,000)  
Net 439,000  
Customer Relationships
    
Cost 4,028,000  
Accumulated amortization (3,650,000)  
Net 378,000  
Distributor Relationships
    
Cost 391,000  
Accumulated amortization (362,000)  
Net 29,000  
NonCompete Agreements
    
Cost 218,000  
Accumulated amortization (218,000)  
Net 0  
Trademarks
    
Cost   3,568,000
Accumulated amortization   0
Net   3,568,000
Patents and technology
    
Cost   4,511,000
Accumulated amortization   (3,941,000)
Net   570,000
Customer Relationships
    
Cost   4,033,000
Accumulated amortization   (3,562,000)
Net   471,000
Distributor Relationships
    
Cost   393,000
Accumulated amortization   (356,000)
Net   37,000
NonCompete Agreements
    
Cost   218,000
Accumulated amortization   (218,000)
Net   $ 0