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Inventories (Tables)
9 Months Ended
Sep. 28, 2019
Inventory Disclosure [Abstract]  
Summary of Inventories
Inventories are stated at the lower of average cost or market and consist of the following:
 
   
September 28,
2019
   
December 29,
2018
 
   
(In thousands)
 
Raw materials
  $15,700   $16,354 
Work-in-progress
   11,843    9,134 
Finished goods
   2,308    5,109 
   
 
 
   
 
 
 
   $29,851   $30,597