Income tax expense/(credit) - Deferred tax liability assets (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets and liabilities [abstract]
Deferred tax assets	$ (243,449)	$ (79,702)
Deferred tax liabilities	3,185,440	659,498
Deferred tax liability (asset)	$ 2,941,991	$ 579,796	$ (1,951,154)	$ 0

The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2022-03-24
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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