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Income Taxes - Summary of Significant Components of Net Deferred Income Tax Assets and Liabilities (Details) - USD ($) | Dec. 31, 2022 | Dec. 31, 2021
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Deferred income tax assets and liabilities |  |
Accrued compensation and other | $ 11,000 | $ 11,000
Less: valuation allowance | (11,000) | (11,000)
Current deferred income tax assets | 0 | 0
Net operating loss | 13,642,000 | 13,013,000
Research and development credit | 18,000 | 18,000
Research and experimental costs | 595,000 |
Warrants issued for services | 45,000 | 45,000
Depreciation and amortization | 135,000 | 126,000
Exercise of options and warrants | (36,000) | (33,000)
Stock based compensation | 1,149,000 | 1,028,000
Intangibles and other | (633,000) | (606,000)
Less: valuation allowance | (14,915,000) | (13,591,000)
Net non-current deferred tax assets | $ 0 | $ 0

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