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Note 4 - Restructuring Charges (Tables)
 9 Months Ended
Sep. 28, 2019
Notes Tables  
Restructuring and Related Costs [Table Text Block]
   
Severance and
    
Other Exit
          
   
Other Payroll
    
Costs
    
Total
  
Balance, December 29, 2018
   $
4,026
     $
-
     $
4,026
  
Costs accrued
    
10,167
      
553
      
10,720
  
Amounts paid or charged
    
(9,251
 )    
(553
 )    
(9,804
 )
Impact of currency exchange
    
(137
 )    
-
      
(137
 )
Balance, September 28, 2019
   $
4,805
     $
-
     $
4,805