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Inventories (Tables)
9 Months Ended
Sep. 29, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories consisted of the following (in thousands):
 
September 29, 2019
 
December 31, 2018
Raw materials
$
30,283

 
$
42,738

Work-in-process
4,848

 
3,435

Finished goods
30,133

 
37,109

 
$
65,264

 
$
83,282