Related party transactions and balances - Purchases of a related party (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Purchases from a related parties	$ 14,999,058	$ 10,313,046
Focal Capital Holding Limited
Related Party Transaction [Line Items]
Purchases from a related parties	6,157,455	7,003,714
Foremost Worldwide Co., Ltd.
Related Party Transaction [Line Items]
Purchases from a related parties	8,385,673	2,308,468
Rizhao Foremost Woodwork Manufacturing Co., Ltd.
Related Party Transaction [Line Items]
Purchases from a related parties	330,722	16,026
F.P.Z. Furniture (Cambodia) Co., Ltd.
Related Party Transaction [Line Items]
Purchases from a related parties	125,208	575,061
Foremost Australasia Pty Ltd
Related Party Transaction [Line Items]
Purchases from a related parties	$ 0	$ 409,777