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Cash and cash equivalents (Tables)
 12 Months Ended
Dec. 31, 2021
Cash and cash equivalents [Abstract]  
Cash and Cash Equivalents
Cash and cash equivalents as of December 31, 2021 and 2020, are summarized as follows:
 
   
2021
    
2020
  
Cash on hand
  
$
738
    
$
756
  
Cash at banks
    
38,829
      
49,356
  
Short-term investments (a)
    
-
      
55,198
  
   
$
39,567
    
$
105,310
  


(a)
Includes fix-term deposits (promissory notes) and repurchase/resell agreements with terms up to 3 days.