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Income Taxes - Income Tax Benefit Attributable to Our Loss from Operations (Details) - USD ($)
$ in Thousands
 12 Months Ended
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