Share-Based Compensation - Stock option activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Shares
Options outstanding at the beginning of the period (in shares)	16,000
Granted (in shares)	0
Options outstanding at the end of the period (in shares)	16,000	16,000
Options exercisable at the end of the period (in shares)	16,000
Number of unvested options at end of year	0	0	0
Weighted Average Exercise Price
Options outstanding at the beginning of the period (in dollars per share)	$ 391.76
Expired (in dollars per share)	817.91
Options outstanding at the end of the period (in dollars per share)	362.76	$ 391.76
Options exercisable at the end of the period (in dollars per share)	$ 362.76
Weighted Average Remaining Contractual Term
Options outstanding at the end of the period	4 years 2 months 19 days
Options exercisable at the end of the period	4 years 2 months 19 days
Directors
Shares
Granted (in shares)		1,056	963