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Note 13 - Commitments and Contingencies (Details) (USD $)
9 Months Ended
Sep. 28, 2014
Sep. 29, 2013
Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]      
Product Warranty Accrual $ 1,035,000   $ 1,439,000
Product Warranty Expense 108,000 579,000  
Period of Extended Product Warranty Two 5 years    
Extended Product Warranty Accrual 938,000   1,567,000
Purchase Obligation 7,232,000    
Letters of Credit Outstanding, Amount $ 768,000