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Inventories (Tables)
 3 Months Ended
Apr. 04, 2020
Inventory Disclosure [Abstract]  
Summary of Inventories Inventories consisted of the following:

 

 

 

April 4,

 

 

December 28,

 

 

 

2020

 

 

2019

 

 

 

(in thousands)

 

Raw materials

 

$

49,566

 

 

$

41,255

 

Work-in-progress

 

 

1,642

 

 

 

2,337

 

Finished goods

 

 

439

 

 

 

259

 

 

 

 

 

 

 

 

 

 

 

 

$

51,647

 

 

$

43,851