Leases - Lease assets and liabilities (Details) - USD ($)	Jun. 30, 2025	Dec. 31, 2024
Noncurrent
Operating lease right-of-use assets	$ 3,240,112	$ 3,190,985
Total lease right-of-use assets	3,331,240	3,232,786
Current
Current maturities of operating leases	681,140	634,947
Noncurrent
Noncurrent operating leases	2,680,470	2,630,812
Total lease liabilities	$ 3,361,610	$ 3,265,759
Operating leases, weighted average remaining lease term	4 years 8 months 12 days	5 years
Operating leases, weighted average discount rate	6.55%	6.56%
Prepaid expenses and other current assets
Current
Operating lease assets, current	$ 91,128	$ 41,801