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Inventories (Tables)
3 Months Ended
Mar. 31, 2022
Inventories [Abstract]  
Inventories
Inventories consist of the following:
 
   
March 31, 2022
   
December 31, 2021
 
Raw materials and work-in-process
 
$
3,881
   
$
3,201
 
Finished goods
   
877
     
288
 
Total inventories
 
$
4,758
   
$
3,489