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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