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v3.25.1

Income taxes - Net long-term deferred tax liability (Details) - USD ($) | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 80,285 | $ 130,911
Accruals and reserves | 209,549 | 146,057
Operating lease liabilities | 425,797 | 501,397
Capitalized research expenditures | 316,937 | 326,178
Others | 88,750 | 29,094
Valuation allowances | 0 | 0
Deferred tax assets | 1,121,318 | 1,133,637
Deferred tax liabilities: |  |
Property and equipment | 239,830 | 325,473
Intangible assets | 672,973 | 847,450
Operating lease right-of-use assets | 419,408 | 491,494
Deferred Tax Liabilities, Gross | 1,332,211 | 1,664,417
Net deferred tax liability | 210,893 | 530,780
Discontinued Operations |  |
Deferred tax assets: |  |
Valuation allowances | 0 | (15,678,994)
Operating loss carryforwards - Mexico | 0 | 5,844,847
Land basis difference - Mexico | 0 | 2,818,663
Start-up costs - Mexico | 0 | 7,015,484
Deferred tax assets | $ 0 | $ 0

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