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Collaboration Agreements, License Agreement and Revenues - Transaction Price Related to Consideration Received and Accounts Receivable Allocated to Performance Obligations Deferred Revenue (Parenthetical) (Detail) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Revenue Recognition, Multiple-deliverable Arrangements [Line Items] |  |
Deferred revenue, net of current | $ 154,206 | $ 185,722
AstraZeneca Agreements [Member] |  |
Revenue Recognition, Multiple-deliverable Arrangements [Line Items] |  |
Deferred Revenue | 177,576 | $ 175,646
AstraZeneca Agreements [Member] | U.S./RoW [Member] |  |
Revenue Recognition, Multiple-deliverable Arrangements [Line Items] |  |
Deferred revenue, net of current | 151,400 |
Deferred Revenue | 177,600 |
Net unbilled milestone and co-development revenue | $ 26,200 |

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