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Inventories
3 Months Ended
Mar. 30, 2019
Inventory Disclosure [Abstract]  
Inventories
4. Inventories
Inventories consist of the following (in thousands):
 
March 30,
2019
 
December 29,
2018
Raw materials
$
41,520

 
$
38,955

Work-in-process
10,677

 
9,036

Finished goods
41,062

 
46,741

     Total inventories
$
93,259

 
$
94,732