Share-Based Compensation - Activity of Service Period Based Stock Options (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Stock Option Activity, Additional Disclosures
Share price (in dollars per share)	$ 1.46
Service period based stock options
Number of Options
Options Outstanding Beginning Balance (in shares)	9,397
Options Granted (in shares)	2,650
Options Exercised (in shares)	0
Options Forfeited (in shares)	(1,171)
Options Outstanding Ending Balance (in shares)	10,876	9,397
Options Exercisable (in shares)	7,507
Weighted Average Exercise Price
Options Outstanding Beginning Balance (in dollars per share)	$ 4.21
Options Granted (in dollars per share)	1.79
Options Exercised (in dollars per share)	0
Options Forfeited (in dollars per share)	3.98
Options Outstanding Ending Balance (in dollars per share)	3.64	$ 4.21
Options Exercisable (in dollars per share)	$ 4.32
Stock Option Activity, Additional Disclosures
Weighted Average Remaining Contractual Term, Options Outstanding	6 years 1 month 6 days	6 years 2 months 12 days
Weighted Average Remaining Contractual Term, Options Exercisable	4 years 7 months 6 days
Aggregate Intrinsic Value, Options Outstanding	$ 3	$ 44
Aggregate Intrinsic Value, Options Exercisable	$ 1