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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

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