Accounts receivable, net - Allowance for Doubtful Accounts Roll Forward (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 244,879	$ 438,843
Provision	137,592	78,640
Write-off	(190,650)	(272,604)
Ending balance	$ 191,821	$ 244,879