Balance Sheet Details - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Property Plant And Equipment [Line Items]
Total property and equipment	$ 176,654	$ 88,898
Less: accumulated depreciation and amortization	(13,411)	(9,272)
Property and equipment, net	163,243	79,626
Furniture and equipment
Property Plant And Equipment [Line Items]
Total property and equipment	1,608	1,608
Computers and computer software
Property Plant And Equipment [Line Items]
Total property and equipment	1,001	771
Lab equipment
Property Plant And Equipment [Line Items]
Total property and equipment	31,328	25,110
Leasehold improvements
Property Plant And Equipment [Line Items]
Total property and equipment	4,059	1,460
Manufacturing equipment
Property Plant And Equipment [Line Items]
Total property and equipment	15,390	8,134
Manufacturing facility and equipment construction in progress
Property Plant And Equipment [Line Items]
Total property and equipment	$ 123,268	$ 51,815