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Note 8 - Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
   
Thirty-Nine
Weeks Ended
  
   
September 30,
2017
    
October 1,
2016
  
Beginning b
alance
   $
171
     $
252
  
                 
Amortization of intangibles during the
thirty-nine week period presented
    
(50
)
    
(63
)
                 
Ending b
alance
  $
121
     $
189