Cash and Cash Equivalents (Tables)
 12 Months Ended
Dec. 31, 2021
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Summary of Cash and Cash Equivalents
 
 
  
December 31,
 
     
  
  
2021        
 
  
2020     
 
Cash
  
 
 
 
  
 
 
 
Cash at bank and on hand
  
 
389
 
  
 
 311
 
Cash equivalents
  
 
 
 
  
 
 
 
Money market accounts
  
 
389
 
  
 
 1,476
 
Cash and cash equivalents
  
 
778
 
  
 
 1,787