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Trade and other payables
 9 Months Ended
Sep. 30, 2021
Trade and other payables [Abstract]  
Trade and other payables
9.
Trade and other payables:

   
September 30, 2021
(Unaudited)
    
December 31,
2020
  
Trade payables and other payables
  
$
5,522,624
    
$
881,394
  
Total
  
$
5,522,624
    
$
881,394
  

Trade payables include balances of suppliers and consulting service providers. Other payables include $1.8 million for executive severance as of September 30, 2021.