Leases - Lease assets and liabilities (Details) - USD ($)	Sep. 30, 2025	Dec. 31, 2024
ASSETS
Total operating lease right-of-use assets	$ 3,095,156	$ 3,232,786
Current
Current maturities of operating leases	667,074	634,947
Noncurrent
Noncurrent operating leases	2,457,151	2,630,812
Total lease liabilities	$ 3,124,225	$ 3,265,759
Operating leases, weighted average remaining lease term	4 years 4 months 24 days	5 years
Operating leases, weighted average discount rate	6.55%	6.56%