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Balance Sheet Components - Intangible Assets, Net (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Jun. 26, 2024
Mar. 01, 2024
Mar. 31, 2024
Dec. 31, 2024
Dec. 31, 2023
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]          
Finite-lived assets, net of accumulated amortization of $2,719 and $639 as of December 31, 2024 and December 31, 2023, respectively       $ 24,787 $ 41,871
Accumulated amortization       2,719 639
Indefinite-lived assets - in-process research and development       28,859 28,859
Goodwill         943
Intangible assets, net subtotal       53,646 71,673
Less: Intangible assets, net from assets of discontinued operations         (4,065)
Intangible assets, net       53,646 67,608
Amortization expense, Finite-lived intangible assets       3,400  
Expected amortization expense for the remaining finite-lived assets for each of the five succeeding fiscal years       $ 2,700  
Remaining life of the finite-lived assets       9 years 4 months 24 days  
Impairment charge       $ 0 0
Impairment of intangible assets         $ 0
Novartis Institutes          
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]          
Impairment charge     $ 10,600    
Disposal Group | CIMERLI Sale          
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]          
Finite-lived intangible asset, net   $ 2,100      
Goodwill, Written off   $ 900      
Disposal Group | YUSIMRY Sale          
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]          
Goodwill, Written off $ 900