Derivative Liabilities - Changes in Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
2018 Exit Fee
Change in Fair Value of Derivative Liability
Fair value of exit fee derivative liabilities, beginning	$ 1,200
Fair value of exit fee derivative liabilities, ending	0	$ 1,200
2022 Exit Fee
Change in Fair Value of Derivative Liability
Fair value of exit fee derivative liabilities, beginning	400
Fair value of exit fee derivative liabilities, ending	700	400
Exit fee derivative liability
Change in Fair Value of Derivative Liability
Fair value of exit fee derivative liabilities, beginning	1,656	698
2022 Exit Fee addition at fair value	0	375
Fair value of exit fee derivative liabilities, ending	675	1,656
Exit fee derivative liability | 2018 Exit Fee
Change in Fair Value of Derivative Liability
Changes in estimated fair value:	292	510
2018 Exit Fee payment	(1,500)	0
Exit fee derivative liability | 2022 Exit Fee
Change in Fair Value of Derivative Liability
Changes in estimated fair value:	$ 227	$ 73