Balance Sheets Components - Schedule of Intangible Assets Net (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Finite Lived Intangible Assets [Line Items]
Gross Assets	$ 127,498	$ 127,144
Accumulated Amortization	(29,603)	(19,565)
Net Assets	97,895	107,579
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Assets	196,998	196,644
Accumulated Amortization	(29,603)	(19,565)
Net Assets	167,395	177,079
In-process research and development
Indefinite-Lived Intangible Assets [Line Items]
In-process research and development	69,500	69,500
Developed technology
Finite Lived Intangible Assets [Line Items]
Gross Assets	96,700	96,700
Accumulated Amortization	(7,371)	(159)
Net Assets	89,329	96,541
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	(7,371)	(159)
Contract based royalty asset
Finite Lived Intangible Assets [Line Items]
Gross Assets	5,900	5,900
Accumulated Amortization	(1,229)	(121)
Net Assets	4,671	5,779
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	(1,229)	(121)
Internal use software
Finite Lived Intangible Assets [Line Items]
Gross Assets	9,434	9,434
Accumulated Amortization	(9,434)	(9,234)
Net Assets	0	200
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	(9,434)	(9,234)
Purchased software
Finite Lived Intangible Assets [Line Items]
Gross Assets	15,464	15,110
Accumulated Amortization	(11,569)	(10,051)
Net Assets	3,895	5,059
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	$ (11,569)	$ (10,051)