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Accounts receivable (Tables)
9 Months Ended
Sep. 30, 2021
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable

The accounts receivable as at September 30, 2021, is summarized as follows:

 

   September 30, 2021   December 31, 2020 
Accounts receivable  $3,595,222   $3,989,200 
Expected credit losses   (55,538)   (55,660)
Net accounts receivable  $3,539,684   $3,933,540