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Note 5 - Impairment of Goodwill and Intangible Assets (Details Textual) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Oct. 01, 2016
Sep. 26, 2015
Oct. 01, 2016
Sep. 26, 2015
Dec. 26, 2015
Jul. 02, 2016
Industrial [Member] | Custom Products Reporting Unit [Member] | Trade Names [Member]            
Impairment of Intangible Assets (Excluding Goodwill) $ 3,800,000          
Intangible Assets, Net (Excluding Goodwill) 700,000   $ 700,000      
Industrial [Member] | Custom Products Reporting Unit [Member] | Customer Relationships [Member]            
Impairment of Intangible Assets (Excluding Goodwill) 2,200,000          
Intangible Assets, Net (Excluding Goodwill) 0   0      
Industrial [Member] | Custom Products Reporting Unit [Member]            
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount         12.00% 10.00%
Goodwill, Impairment Loss 8,800,000       $ 0  
Goodwill and Intangible Asset Impairment 14,800,000          
Impairment of Intangible Assets (Excluding Goodwill) 6,000,000          
Goodwill and Intangible Asset Impairment $ 14,809,000 $ 14,809,000