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Note 1 - Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 30, 2018
Notes Tables  
Schedule of Goodwill [Table Text Block]
BALANCE
JANUARY 1,
2018
    
ACQUISITIONS
    
PURCHASE
PRICE
ACCOUNTING
ADJUSTMENTS
    
IMPAIRMENT
    
FOREIGN
CURRENCY
TRANSLATION
    
BALANCE
DECEMBER 30,
2018
  
 
 
 
  
(in thousands)
  
$ 68,754     $
183,348
     $
1,377
     $
0
     $
(7,664
 )   $
245,815