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Inventory (Tables)
12 Months Ended
Dec. 28, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventory consisted of the following (in thousands):
 
December 31,
 
2018
 
2017
Raw materials
$
1,922

 
$
498

Work in process
6,170

 
3,997

Finished goods
3,836

 
2,854

Total
$
11,928

 
$
7,349

 
 
 
 
Balance Sheet classification:
 
 
 
Inventory
$
9,838

 
$
6,657

Inventory included in Other long-term assets
2,090

 
692

Total
$
11,928

 
$
7,349