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Inventories
 12 Months Ended
Dec. 31, 2021
Inventories [Abstract]  
Inventories
5. Inventories


Inventories consist of the following (in thousands):

 
December 31,
  
 
2021
    
2020
  
Raw materials and work-in-process
  
$
3,201
    
$
2,949
  
Finished goods
    
288
      
495
  
 
$
3,489
    
$
3,444
  


Work-in-process is immaterial given the Company’s typically short manufacturing cycle and therefore, is included in with raw materials.