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Inventory
12 Months Ended
Jan. 01, 2021
Inventory Disclosure [Abstract]  
Inventory INVENTORY
Inventory consisted of the following (in thousands):
 
December 31,
 
20202019
Raw materials$7,773 $2,709 
Work in process20,610 9,447 
Finished goods7,291 4,367 
Total$35,674 $16,523 
Balance Sheet classification:
Current portion included in inventory$20,973 $12,886 
Long-term portion included in other long-term assets14,701 3,637 
Total$35,674 $16,523 
Write-downs related to excess and expiring inventory were $2.7 million, $1.3 million and $1.1 million for the years ended December 31, 2020, 2019 and 2018, respectively.