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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Operating Loss Carryforwards [Line Items] |  |
Income tax expense | $ 109 | $ 91
Unrecognized tax benefits that are subjected to a valuation allowance | 1,600 | 1,500
Unrecognized tax benefits, income tax penalties and interest expense | 66 | 61
Unrecognized tax benefits, Income tax penalties and interest accrued | 400 | $ 300
Federal |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards | 361,000 |
Tax credit carryforwards | 9,300 |
State |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards | 6,200 |
Tax credit carryforwards | $ 1,800 |

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