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Income Taxes (Details - Income Tax Reconciliation) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Reconciliation of income tax benefit to statutory rate: |  |
Income benefit at statutory rate | $ (3,409) | $ (3,948)
State income taxes (benefit), net of federal income tax benefit | (107) | (331)
Permanent differences | 89 | (206)
Change in valuation allowance | (5,899) | 2,458
Expiring federal net operating losses | 9,745 | 0
Other | (419) | 2,027
Income tax provision | $ 0 | $ 0

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