Related party transactions and balances - Shared Service and Miscellaneous Expenses - General Information (Details) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Shared Services Agreement and Miscellaneous Expenses, Provide Services \| Foremost Home Inc. (“FHI”)
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction	$ 122,621	$ 172,573	$ 267,426	$ 343,536
Shared Services Agreement and Miscellaneous Expenses, Receive Services \| Foremost Worldwide Co., Ltd.
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction	$ 66,863	$ 72,875	$ 141,472	$ 133,571

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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+ Details