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Stockholders' Equity - Stock-based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Stockholders' Equity        
Compensation expense $ 60 $ 580 $ 120 $ 610
Operating cost     $ 122 517
Costs and Expenses        
Stockholders' Equity        
Compensation expense   480   510
Other income        
Stockholders' Equity        
Compensation expense   100   100
Non Management Directors        
Stockholders' Equity        
Compensation expense   190   210
Employee        
Stockholders' Equity        
Compensation expense   $ 390   $ 400