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Note 8 - Intangible Assets (Tables)
6 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block]
   
Twenty-Six Week Periods Ended
 
   
June 30, 2018
   
July 1, 2017
 
Customer contracts and relations
  $
59
    $
115
 
Non-compete agreements
   
12
     
22
 
                 
Intangible assets
  $
71
    $
137