Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Stock Option Activity (Details)

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Stock-Based Compensation - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
2018 Stock Option and Incentive Plan    
Number of Shares    
Beginning balance (in shares) 1,750  
Granted (in shares) 1,500  
Exercised (in shares) 0  
Forfeited/Cancelled/Expired (in shares) (750)  
Ending balance (in shares) 2,500 1,750
Options exercisable (in shares) 2,500  
Weighted Average Exercise Price    
Beginning balance (in dollars per share) $ 71.73  
Granted (in dollars per share) 38.15  
Exercised (in dollars per share) 0  
Forfeited/Cancelled/Expired (in dollars per share) 54.00  
Ending balance (in dollars per share) 56.89 $ 71.73
Options exercisable (in dollars per share) $ 56.89  
Weighted Average Remaining Contractual Term (years)    
Outstanding 4 years 2 months 8 days 5 years 7 months 6 days
Exercisable 4 years 2 months 8 days  
Aggregate Intrinsic Value    
Outstanding $ 0 $ 0
Exercisable $ 0  
2009 Stock Option and Incentive Plan    
Number of Shares    
Beginning balance (in shares) 17,495  
Granted (in shares) 0  
Exercised (in shares) (1,895)  
Forfeited/Cancelled/Expired (in shares) (975)  
Ending balance (in shares) 14,625 17,495
Options exercisable (in shares) 14,625  
Weighted Average Exercise Price    
Beginning balance (in dollars per share) $ 40.22  
Granted (in dollars per share) 0  
Exercised (in dollars per share) 30.36  
Forfeited/Cancelled/Expired (in dollars per share) 67.56  
Ending balance (in dollars per share) 39.67 $ 40.22
Options exercisable (in dollars per share) $ 39.67  
Weighted Average Remaining Contractual Term (years)    
Outstanding 2 years 11 months 8 days 4 years 2 months 19 days
Exercisable 2 years 11 months 8 days  
Aggregate Intrinsic Value    
Outstanding $ 0 $ 130
Exercisable $ 0