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Note 2 - Dispositions and Exit Activities (Detail) (USD $)
 9 Months Ended 12 Months Ended
Sep. 28, 2012
Dec. 31, 2012
Lease Exit Costs Continuing Operations   $ 228
Lease Exit Costs Discontinued Operations   815
Percentage Of Subsidiary Stock Sold 100.00%  
Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds 2,533,000  
Proceeds from Divestiture of Businesses 2,133,000  
Length Of Time Sales Proceeds Held In Escrow 1 year  
Escrow Deposit 250,000  
Sales Price Reserved For Employee Retention Programs $ 150,000  
Divestiture Non Compete Period 2 years  
Divestiture No Tampering Period 2 years  
Minimum [Member]
    
Divestiture Representations And Warranties Period 2 years  
Maximum [Member]
    
Divestiture Representations And Warranties Period 3 years