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Inventory
12 Months Ended
Dec. 31, 2021
Inventory  
Inventory

4. Inventory

Inventory consisted of the following (in thousands):

December 31, 

    

2021

2020

Raw materials

$

6,242

$

2,099

Work-in-progress

551

 

213

Finished goods

1,125

 

2,256

$

7,918

$

4,568