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Right-of-use asset - Schedule of right-of-use asset (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of quantitative information about right-of-use assets [abstract]      
Beginning balance $ 0 $ 95,851  
Additions 179,755    
Amortization (8,300) (5,991)  
Impairment 0 (89,860) $ (50,888)
Effects of foreign exchange (3,148)    
Ending balance $ 168,307 $ 0 $ 95,851