Net Loss Per Common Share - Schedule of Net Loss Per Common Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 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
Numerator:
Net loss	$ (25,590)	$ (23,869)	$ (23,849)	$ (35,102)	$ (122,733)	$ (177,280)	$ (73,308)	$ (335,115)
Denominator:
Weighted-average shares used to compute basic net loss per share (in shares)	47,684,363			39,228,118			45,287,763	35,670,408
Weighted-average shares used to compute diluted net loss per share (in shares)	47,684,363			39,228,118			45,287,763	35,670,408
Net loss per common share, basic (in dollars per share)	$ (0.54)			$ (0.89)			$ (1.62)	$ (9.39)
Net loss per common share, diluted (in dollars per share)	$ (0.54)			$ (0.89)			$ (1.62)	$ (9.39)