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Note 1 - Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jul. 04, 2015
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
   
Six months ended
 
   
July 4, 2015
   
June 28, 2014
 
                 
Beginning balance
  $ 237     $ 383  
Additions charged to Cost of sales
    19       133  
Claims processed
    (120 )     (315 )
Ending balance
  $ 136     $ 201