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Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Deferred tax assets: |  |
Net operating loss and tax credit carryforwards | $ 67,688,664 | $ 64,609,834
Start-up costs | 0 | 6,033
Excess of book over tax depreciation | 39,070 | 206,998
Stock option and restricted stock award expense | 1,799,988 | 1,806,546
Debt Extinguishment | 61,946 | 61,945
Less: valuation allowance | (69,345,930) | (66,461,662)
Deferred tax assets | 243,738 | 229,694
Deferred tax liability: |  |
Property and equipment basis | 84,020 | 50,174
Prepaid expenses | 159,718 | 179,520
Deferred tax liabilities | 243,738 | 229,694
Net deferred tax asset | $ 0 | $ 0

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