Accounts receivable, net (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounts receivable, net.
Trade accounts receivable	$ 38,446,554	$ 27,163,719
Receivable from OC-BVI	41,129	37,293
Other accounts receivable	322,609	28,384
Accounts Receivable, Gross, Current	38,810,292	27,229,396
Allowance for doubtful accounts	(583,401)	(183,214)	$ (183,020)
Accounts receivable, net	$ 38,226,891	$ 27,046,182