Net Loss Per Share - Summary of Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Net loss from continuing operations	$ (37,744)			$ (34,739)			$ (101,526)	$ (57,670)
Net loss from discontinued operations	(1,999)			(47,988)			(27,024)	(165,838)
Net loss	$ (39,743)	$ (21,188)	$ (67,617)	$ (82,727)	$ (66,039)	$ (74,741)	$ (128,550)	$ (223,508)	$ (364,611)	$ (450,464)
Weighted-average number of shares outstanding used to compute net loss per share attributable to common stockholders, basic	1,807,398			1,746,154			1,800,729	1,739,042	1,743,128	1,723,843
Weighted-average number of shares outstanding used to compute net loss per share attributable to common stockholders, diluted	1,807,398			1,746,154			1,800,729	1,739,042	1,743,128	1,723,843
Net loss per share attributable to common stockholders, continuing operations, basic	$ (20.88)			$ (19.89)			$ (56.38)	$ (33.16)	$ (48.52)	$ 69.95
Net loss per share attributable to common stockholders, continuing operations, diluted	(20.88)			(19.89)			(56.38)	(33.16)	(48.52)	69.95
Net loss per share attributable to common stockholders, Discontinued operations, basic	(1.11)			(27.48)			(15.01)	(95.36)	(160.65)	(331.26)
Net loss per share attributable to common stockholders, Discontinued operations, diluted	(1.11)			(27.48)			(15.01)	(95.36)	(160.65)	(331.26)
Total net loss per share attributable to common stockholders, basic	(21.99)			(47.38)			(71.39)	(128.52)	(209.17)	(261.31)
Total net loss per share attributable to common stockholders, diluted	$ (21.99)			$ (47.38)			$ (71.39)	$ (128.52)	$ (209.17)	$ (261.31)