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Income Taxes, NOL and Tax Credit Carryforwards and Income Tax Uncertainties (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Income Taxes [Abstract] |  |
Unrecognized tax benefits | $ 0 | $ 0
Federal [Member] |  |
Income Taxes [Abstract] |  |
Net operating loss carryforwards | 536 |
Net operating loss carryforwards with indefinite carryforward period | 536 |
Federal [Member] | General Business Tax Credit Carryforward [Member] |  |
Income Taxes [Abstract] |  |
Tax credit carryforward | 2,000 |
California [Member] |  |
Income Taxes [Abstract] |  |
Net operating loss carryforwards going to expire if not utilized | $ 21,800 |

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