Share-Based Compensation - Stock option activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Shares
Options outstanding at the beginning of the period (in shares)	16,000
Granted (in shares)	1,000		0
Surrendered (in shares)	(1,000)
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)	$ 419.22
Granted (in dollars per share)	147.66
Surrendered (in dollars per share)	734.90
Options outstanding at the end of the period (in dollars per share)	391.76	$ 419.22
Options exercisable at the end of the period (in dollars per share)	$ 391.76
Weighted Average Remaining Contractual Term
Options outstanding at the end of the period	4 years 10 months 28 days
Options exercisable at the end of the period	4 years 10 months 28 days
Aggregate Intrinsic Value
Options outstanding at the end of the period (in dollars)	$ 211
Options exercisable at the end of the period (in dollars)	$ 211
Directors
Shares
Granted (in shares)	1,056	963