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Note 3 - Borrowings and Credit Agreements (Tables)
 3 Months Ended
Mar. 30, 2019
Notes Tables  
Schedule of Debt [Table Text Block]
      March 30,       December 29,  
      2019       2018  
Bank Term Loan under Credit Agreement
   $
348,250
     $
349,125
  
Bank Term Loans-Kita
    
4,354
      
4,576
  
Bank Term Loan-Xcerra
    
1,729
      
1,839
  
Lines of Credit
    
3,161
      
3,115
  
Total debt
    
357,494
      
358,655
  
Less: financing fees and discount
    
(8,280
 )    
(8,551
 )
Less: current portion
    
(6,582
 )    
(6,676
 )
Total long-term debt
   $
342,632
     $
343,428