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Note 11 - Commitments, Contingencies and Subsequent Event (Tables)
6 Months Ended
Jun. 26, 2016
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
 
 
Six month periods ended
 
 
 
June 26, 2016
 
 
June 28, 2015
 
Accrued Warranty Obligations – Beginning
  $ 192     $ 376  
Accruals for Warranties Issued
    26       13  
Settlements Made
    (42 )     (13 )
Accrued Warranty Obligations – Ending
  $ 176     $ 376