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Note 4 - Restructuring Charges (Tables)
 3 Months Ended
Mar. 28, 2020
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
    
753
      
608
      
1,361
  
Amounts paid or charged
    
(1,029
 )    
(608
 )    
(1,637
 )
Impact of currency exchange
    
4
      
-
      
4
  
Balance, March 30, 2019
   $
3,754
     $
-
     $
3,754
  
                         
Balance, December 28, 2019
   $
1,236
     $
-
     $
1,236
  
Costs accrued
    
234
      
169
      
403
  
Amounts paid or charged
    
(1,218
 )    
(169
 )    
(1,387
 )
Impact of currency exchange
    
(33
 )    
-
      
(33
 )
Balance, March 28, 2020
   $
219
     $
-
     $
219