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Inventory
3 Months Ended
Apr. 02, 2021
Inventory Disclosure [Abstract]  
INVENTORY INVENTORY
Inventory consisted of the following (in thousands):
 
March 31, 2021December 31, 2020
Raw materials$7,988 $7,773 
Work in process21,873 20,610 
Finished goods5,786 7,291 
Total$35,647 $35,674 

Balance Sheet classification:
Current portion included in inventory$24,757 $20,973 
Long-term portion included in other long-term assets10,890 14,701 
Total$35,647 $35,674 
Write-downs related to excess and expiring inventory were $2.1 million and $0.2 million for the three months ended March 31, 2021 and 2020, respectively.