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INVENTORY
3 Months Ended
Mar. 31, 2022
Inventory Disclosure [Abstract]  
INVENTORY

 

5. INVENTORY

 

Inventory consists of the following (in thousands): 

          
   March 31,   December 31, 
   2022   2021 
Finished goods  $18   $ 
Work in process   524    425 
Raw materials   3,861    1,186 
Total inventory  $4,403   $1,611