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Note 1 - Summary of Significant Accounting Policies (Tables)
9 Months Ended
Oct. 03, 2015
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
   
Nine months ended
 
   
October 3, 2015
   
September 27, 2014
 
                 
Beginning balance
  $ 237     $ 383  
Net (release) addition (credited) charged to Cost of sales
    (9 )     245  
Claims processed
    (135 )     (465 )
Ending balance
  $ 93     $ 163