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Income Taxes - Deferred tax assets and liabilities (Details) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Deferred taxes, net |  |
Net operating loss carryforward | $ 235,000 | $ 211,000
Accruals | 52,000 | 62,000
Reserves | 150,000 | 66,000
Property, plant and equipment, and intangible assets | 194,000 | 124,000
Stock-based compensation expense | 85,000 | 85,000
Other | 7,000 | 63,000
Total deferred tax assets | 723,000 | 611,000
Valuation allowance | (640,000) | (477,000)
Net deferred tax assets | 83,000 | $ 134,000
Intangible assets | (626,000) |
Net deferred tax liabilities | $ (626,000) |

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