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Income Taxes - Income Tax Benefit Attributable to Our Loss from Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |
U.S. federal income tax benefit at statutory rates | $ (1,121) | $ (2,085)
State income tax benefit, net of federal benefit | (192) | (357)
Research and experimentation credits | 0 | 0
Deferred tax asset adjustment | 47 | 2
Other | 107 | 186
Change in valuation allowance | 1,159 | 2,254
Income tax benefit | $ 0 | $ 0

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