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Note 3 - Borrowings and Credit Agreements (Tables)
 3 Months Ended
Mar. 28, 2020
Notes Tables  
Schedule of Debt [Table Text Block]
   
March 28,
    
December 28,
  
   
2020
    
2019
  
Bank Term Loan under Credit Agreement
   $
345,625
     $
346,500
  
Bank Term Loans-Kita
    
3,745
      
3,830
  
Bank Term Loan-Xcerra
    
1,392
      
1,475
  
Construction Loan-Rasco
    
6,588
      
5,476
  
Lines of Credit
    
3,244
      
3,195
  
Total debt
    
360,594
      
360,476
  
Less: financing fees and discount
    
(7,151
 )    
(7,441
 )
Less: current portion
    
(6,566
 )    
(6,517
 )
Total long-term debt
   $
346,877
     $
346,518