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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Operating Loss Carryforwards [Line Items]    
Income tax expense $ 147 $ 109
Unrecognized tax benefits that are subjected to a valuation allowance 1,700 1,600
Unrecognized tax benefits, income tax penalties and interest expense 100  
Unrecognized tax benefits, Income tax penalties and interest accrued 500 $ 400
Federal    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 389,900  
Tax credit carryforwards 9,800  
State    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 7,300  
Tax credit carryforwards $ 2,000