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Intangible assets (Tables)	12 Months Ended
Intangible assets (Tables)	Dec. 31, 2023
Intangible assets [Abstract]
Reconciliation of carrying amount of intangible assets	At December 31, 2023 Intellectual property Cost Beginning of year $ 118,819 End of year 118,819 Accumulated amortization and impairment Beginning of year 71,758 Amortization charge 3,484 End of year 75,242 Net book value at December 31, 2023 $ 43,577 At December 31, 2022 Intellectual Contracts property Total Cost Beginning of year $ 110,618 $ 118,819 $ 229,437 Effect of movements in exchange rates 8,027 - 8,027 End of year 118,645 118,819 237,464 Accumulated amortization and impairment Beginning of year 109,886 68,304 178,190 Amortization charge 739 3,454 4,193 Effect of movements in exchange rates 7,964 - 7,964 End of year 118,589 71,758 190,347 Net book value at December 31, 2022 $ 56 $ 47,061 $ 47,117