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Note 11 - Commitments and Contingencies (Details) (USD $)
9 Months Ended
Sep. 29, 2013
Sep. 30, 2012
Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]      
Product Warranty Accrual $ 1,421,000   $ 1,111,000
Product Warranty Expense 579,000 327,000  
Period of Extended Product Warranty One 3 years    
Period of Extended Product Warranty Two 5 years    
Extended Product Warranty Accrual 1,868,000   2,607,000
Purchase Obligation 6,641,000    
Letters of Credit Outstanding, Amount $ 806,000