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Balance Sheet Components - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023 | Jul. 31, 2021
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |
Cash and cash equivalents | $ 140,714,000 |  | $ 140,714,000 |  | $ 113,688,000 |
Impairment loss | 0 | $ 0 | 0 | $ 0 |  |
API and bulk drug product price true-up | 10,991,000 |  | 10,991,000 |  | 50,978,000 |
Accrued inventory related cost | 8,521,000 |  | 8,521,000 |  | 0 |
Accrued litigation settlement | 28,500,000 |  | 28,500,000 |  | 28,500,000 |
Net unbilled co-development revenue | 0 |  | 0 |  | 0 |
Litigation settlement receivable | 28,500,000 |  | 28,500,000 |  | 28,500,000 |
Short-term investments | 0 |  | 0 |  | 121,898,000 |
Long-term investment | 0 |  | 0 |  |  |
Eluminex Agreements [Member] |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |
Aggregate consideration received for milestone and upfront payments | 4,000,000 |  | 4,000,000 |  | 4,000,000 | $ 8,000,000
AstraZeneca Agreements [Member] |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |
Inventory write-down |  |  | 12,600,000 |  |  |
Net unbilled co-development revenue | 23,300,000 |  | 23,300,000 |  | 22,500,000 |
Payment to related parties | 11,500,000 |  |  |  |  |
Astellas Agreement [Member] |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |
Payment to related parties | 35,300,000 |  |  |  |  |
Foreign subsidiaries [Member] |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |
Cash and cash equivalents | $ 39,300,000 |  | $ 39,300,000 |  | $ 32,200,000 |

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