Income taxes - Provision for income taxes (Details) - USD ($)	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Current:
Federal	$ 5,611,360	$ 430,116
State	1,663,653	(29,157)
Total	7,275,013	400,959
Deferred:
Federal	(276,070)	(184,469)
State	(248,929)	180,249
Total	(524,999)	(4,220)
Total provision (benefit)	$ 6,750,014	$ 396,739

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