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Income Taxes - Net operating losses (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Taxes      
Net operating losses $ 1,900 $ 4,300 $ 2,900
NOLs, annual limitations on use 71    
Federal      
Income Taxes      
Net operating losses 600 1,100  
NOLs, annual limitations on use 32,300    
NOLs, without regard to this permanent write-off 32,200    
State      
Income Taxes      
Net operating losses 1,300 $ 3,200  
NOLs, annual limitations on use 13,900    
NOLs, without regard to this permanent write-off $ 13,800