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Inventories (Tables)
3 Months Ended
Mar. 28, 2020
Inventory Disclosure [Abstract]  
Summary of Inventories
Inventories are stated at the lower of average cost or net realizable value and consist of the following:
 
   
March 28,
2020
   
December 28,
2019
 
   
(In thousands)
 
Raw materials
  $13,502   $15,286 
Work-in-progress
   7,272    4,748 
Finished goods
   6,434    4,873 
  
 
 
   
 
 
 
  $27,208   $24,907