Income taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets
Allowance for credit losses	$ 45,859	$ 58,476
Other reserve	127,515	61,371
Accrued expenses	152,600	143,823
Lease liability	1,464,256	1,769,328
Charitable contributions	331	8,181
Business interest limitation	634,794	242,862
Net operating loss – federal	976,500	310,099
Net operating loss – state	328,861	27,337
Other	186,554	66,063
Total deferred tax assets	3,917,270	2,687,540
Less: valuation allowance	0	0
Net deferred tax assets	3,917,270	2,687,540
Deferred tax liabilities
Fixed assets	1,416,178	1,728,364
Intangibles	(164,493)	(209,657)
Total deferred tax liabilities	1,251,685	1,518,707
Deferred tax assets, net of deferred tax liabilities	$ 2,665,585	$ 1,168,833