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Note 3 - Inventories (Tables)
3 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
(in thousands)
 
March 31,
2018
   
December 30,
2017
 
Raw materials
  $
66,259
    $
39,030
 
Work in process
   
96,826
     
27,454
 
Finished goods
   
100,884
     
74,305
 
Total
  $
263,969
    $
140,789