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Segment information - Revenue (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of geographical areas [line items] |  |  |
Revenue | $ 275,761,298 | $ 275,852,753 | $ 65,179,515
Non-current assets | 69,288,993 | 41,535,087 | 32,975,407
Hong Kong |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 210,934,144 | 124,926,420 | 35,411,518
Non-current assets | 67,151,416 | 10,993,322 | 3,419,570
United Kingdom |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 64,827,154 | 150,926,333 | 29,767,997
Non-current assets | 1,816,121 | 30,334,739 | 29,510,377
Rest of the world |  |  |
Disclosure of geographical areas [line items] |  |  |
Non-current assets | $ 321,456 | $ 207,026 | $ 45,460

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