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Share-based Compensation Plans (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
USD ($)
$ / shares
shares
Jun. 30, 2023
USD ($)
$ / shares
shares
Jun. 30, 2024
USD ($)
TradingDay
$ / shares
shares
Jun. 30, 2023
USD ($)
$ / shares
shares
Dec. 31, 2023
$ / shares
shares
Restricted Stock Awards          
Share-based Compensation Plans          
Granted (in shares) 0   65,000    
Restricted Stock Awards | Director          
Share-based Compensation Plans          
Unrecognized share-based compensation expense | $ $ 400   $ 400    
Expected period to recognize the expense     3 years 2 months 1 day    
Employee Stock Option          
Share-based Compensation Plans          
Number of share options granted 0   0    
Total intrinsic value | $ $ 0 $ 0 $ 0 $ 0  
Unrecognized share-based compensation expense | $ $ 400   $ 400    
Expected period to recognize the expense     3 years 8 months 4 days    
Granted (in shares)   4,000 0 4,000  
Cancelled or forfeited (in dollars per share) | $ / shares     $ 198.52    
Outstanding stock options 283,850   283,850   291,368
Weighted average exercise price | $ / shares $ 188.84   $ 188.84   $ 189.09
Weighted average grant date fair value per option share | $ / shares   $ 2.95   $ 2.95  
Performance stock options          
Share-based Compensation Plans          
Share based compensation expense | $ $ 0 $ 0 $ 0 $ 0  
Number of shares vested 0 0 0 0  
Market-based Stock Options          
Share-based Compensation Plans          
Expected period to recognize the expense     7 days    
Granted (in shares) 0 0 0 0  
Threshold consecutive trading days, used as a base for measurement of vesting of stock awards | TradingDay     30    
Outstanding stock options 7,500   7,500    
Weighted average exercise price | $ / shares $ 40.2   $ 40.2    
Market-based Stock Options | Minimum          
Share-based Compensation Plans          
Expected option term (in years)     4 years    
Market-based Stock Options | Maximum          
Share-based Compensation Plans          
Expected option term (in years)     4 years 7 months 6 days