Segment information - Schedule of Single Operating Segment (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Information [Abstract]
Revenues	$ 18,928,907	$ 18,186,786	$ 55,044,610	$ 60,978,809
Cost of revenues	(15,155,154)	(12,889,868)	(40,068,834)	(43,442,519)
Selling and marketing	(1,536,703)	(2,139,155)	(5,768,399)	(6,152,821)
General and administrative	(3,162,847)	(3,534,932)	(10,498,297)	(10,507,036)
Other income, net	415,023	365,629	2,094,110	972,953
Income tax (expense) benefit	68,308	(587)	236,859	(21,526)
Net (loss) income of single operating segment	$ (442,466)	$ (12,127)	$ 1,040,049	$ 1,827,860