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Income taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) | Dec. 31, 2024 | Dec. 31, 2023
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Deferred tax assets: |  |
§263A Uniform Capitalization Rules | $ 318,129 | $ 898,412
Warranty reserve | 549,652 | 324,798
Other accrued expenses and liabilities | 1,234,464 | 260,960
Stock-based compensation | 2,831,845 | 1,643,593
Interest expense | 10,568,630 | 407,725
Operating lease liabilities | 738,112 | 1,388,547
Start-up/organization costs | 1,474,570 | 1,582,745
Other | 51,437 | 82,210
Total deferred tax asset | 17,766,839 | 6,588,990
Deferred tax liabilities: |  |
§481(a) Unfavorable Adjustment | (516,494) | (650,714)
Inventories | (751,309) | (1,332,223)
Prepaid insurance | (272,762) | (352,030)
Property, plant and equipment, net | (124,678) | (202,969)
Operating right-of-use assets | (693,355) | (1,350,092)
Intangible Assets | (84,926) | (283,299)
Other | (74,821) | (12,246)
Total deferred tax liability | (2,518,345) | (4,183,573)
Net deferred tax asset | $ 15,248,494 | $ 2,405,417

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