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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 |  |  |  |

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