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Acquisitions, Research Collaborations and License Agreements (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended
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Jan. 31, 2021 | Mar. 31, 2021
Artiva Biotherapeutics, Inc. | Licensing Agreements |  |
Business Acquisition [Line Items] |  |
Upfront and milestone payments | $ 30.0 |
Upfront and milestone payments to be made | $ 15.0 |
Artiva Biotherapeutics, Inc. | Licensing Agreements | Minimum |  |
Business Acquisition [Line Items] |  |
Royalty rate | 7.00% |
Artiva Biotherapeutics, Inc. | Licensing Agreements | Maximum |  |
Business Acquisition [Line Items] |  |
Royalty rate | 14.00% |
Artiva Biotherapeutics, Inc. | Licensing Agreements | Development Milestones |  |
Business Acquisition [Line Items] |  |
Contingent milestone payments collaborative arrangement | $ 217.5 |
Artiva Biotherapeutics, Inc. | Licensing Agreements | Regulatory Milestones |  |
Business Acquisition [Line Items] |  |
Contingent milestone payments collaborative arrangement | 570.0 |
Artiva Biotherapeutics, Inc. | Licensing Agreements | Sales-Based Milestones |  |
Business Acquisition [Line Items] |  |
Contingent milestone payments collaborative arrangement | $ 1,050.0 |
COVID-19 |  |
Business Acquisition [Line Items] |  |
Charges related to program discontinuation |  | $ 170.0

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