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Inventory (Tables)
9 Months Ended
Sep. 28, 2018
Inventory Disclosure [Abstract]  
Inventory
Inventory consisted of the following (in thousands):
 
September 30,
2018
 
December 31, 2017
Raw materials
$
2,344

 
$
498

Work in process
5,203

 
3,997

Finished goods
4,082

 
2,854

Total
$
11,629

 
$
7,349

 
 
 
 
Balance Sheet classification:
 
 
 
Inventory
$
10,433

 
$
6,657

Other long-term assets
1,196

 
692

Total
$
11,629

 
$
7,349