Related party transactions and balances - Shared Service and Miscellaneous Expenses - General Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Shared Services Agreement and Miscellaneous Expenses, Provide Services | Foremost Home Inc. (“FHI”)
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction	$ 615,929	$ 761,672
Shared Services Agreement and Miscellaneous Expenses, Receive Services | Foremost Worldwide Co., Ltd.
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction	$ 279,577	$ 287,993