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Note 13 - Commitments and Contingencies (Details) (USD $)
6 Months Ended
Jun. 29, 2014
Jun. 30, 2013
Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]      
Product Warranty Accrual $ 1,156,000   $ 1,439,000
Product Warranty Expense 145,000 136,000  
Period of Extended Product Warranty Two 5 years    
Period of Extended Product Warranty One 1 year    
Extended Product Warranty Accrual 1,077,000   1,567,000
Purchase Obligation 6,876,000    
Letters of Credit Outstanding, Amount $ 872,000