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Trade and other payables - Schedule of trade and other payables (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Trade and other payables [abstract]    
Trade payables $ 2,995,726 $ 2,063,162
Accrued liabilities 4,455,346 1,622,227
Other payables 59,699 14,714
Total trade and other current payables $ 7,510,771 $ 3,700,103