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Note 6 - Revolving Credit Facility (Tables)
 3 Months Ended
Jun. 29, 2019
Notes Tables  
Schedule of Line of Credit Facilities [Table Text Block]
   
First Quarter
  
   
2020
    
2019
  
   
(In thousands)
  
Reported end of period:
                
Outstanding borrowings
   $
136,014
     $
207,610
  
Weighted average interest rate
    
4.00
%
    
3.62
%
Reported during the period:
                
Maximum amount of borrowings
   $
151,107
     $
294,062
  
Average outstanding borrowings
   $
134,135
     $
262,794
  
Weighted average interest rate
    
3.96
%
    
3.50
%