Accounting policies - Comparative amounts (Details) - USD ($)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accounting policies
Revenue	$ 132,073,368	$ 133,966,633	$ 180,211,233
Services
Accounting policies
Revenue	$ 46,312,325	50,956,489	$ 97,966,650
Services \| Design and consulting revenue \| Previously issued
Accounting policies
Revenue		$ 965,487

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details