Basis of Presentation (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Basis of Presentation
Cash, cash equivalents and marketable securities	$ 235,300						$ 235,300
Net loss	$ (38,260)	$ (30,502)	$ (29,361)	$ (26,784)	$ (36,004)	$ (23,050)	(98,123)	$ (85,838)
Net cash used in operations							$ (74,758)	$ (81,970)