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Inventories (Tables)
6 Months Ended
Jun. 30, 2022
Inventory Disclosure [Abstract]  
Schedule of inventories
Inventories consist of the following (in thousands):
 
    
June 30,
2022
    
December 31,
2021
 
Raw materials
   $ 909      $ 767  
Work-in-process
     1,050        645  
Finished goods
     81        —    
    
 
 
    
 
 
 
Total inventories
   $ 2,040      $ 1,412