Significant Accounting Policies - Goodwill Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill Rollforward [Abstract]
Balance gross		$ 9,802
Balance, accumulated impairment losses		0
Goodwill, beginning balance		9,802
Impairment of goodwill (Note 2)	$ (10,000)	(9,802)	$ 0	$ 0
Balance gross	9,802	9,802	9,802
Ending balance, accumulated impairment losses	(9,802)	(9,802)	0
Goodwill, ending balance	$ 0	$ 0	$ 9,802