Summary of significant accounting policies - Revenues - Disaggregation by Product Line (Details) - USD ($)	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 131,818,073	$ 117,241,604
Sanitaryware
Disaggregation of Revenue [Line Items]
Revenue	81,109,955	75,551,117
Bath Furniture
Disaggregation of Revenue [Line Items]
Revenue	14,739,205	14,770,376
Shower System
Disaggregation of Revenue [Line Items]
Revenue	25,521,977	19,997,197
Others
Disaggregation of Revenue [Line Items]
Revenue	$ 10,446,936	$ 6,922,914

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.

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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+ Details