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Inventories (Tables)
12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of inventories net of reserves
   December 31, 
   2021   2020 
Raw materials  $1,824   $1,706 
Work in process   2,730    1,144 
Finished goods   300    1,213 
   $4,854   $4,063