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Note 3 - Inventories (Tables)
6 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
(in thousands)
 
June 30
,
201
8
   
December 30
,
201
7
 
Raw materials
  $
65,607
    $
39,030
 
Work in process
   
81,448
     
27,454
 
Finished goods
   
92,146
     
74,305
 
Total
  $
239,201
    $
140,789