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

The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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+ Details