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v3.21.2

Related Party Transactions - Additional Information (Detail) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Related Party Transaction [Line Items] |  |  |  |  |
Accounts receivable from related party | $ 23,126,000 |  | $ 23,126,000 |  | $ 4,127,000
Accrued liabilities to related party | 18,000 |  | 18,000 |  | 24,000
Deferred revenue | 7,003,000 |  | 7,003,000 |  | 2,147,000
Investment income | (342,000) | $ 13,000 | (664,000) | $ 13,000 |
Equity method investments | 3,421,000 |  | 3,421,000 |  | 2,728,000
Astellas [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Drug product revenue from a related party |  |  | 2,100,000 | 4,300,000 |
Astellas [Member] | Collaborative Arrangement [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue related to collaboration agreements | 122,600,000 | $ 4,700,000 | 128,800,000 | $ 14,200,000 |
Accounts receivable from related party | 2,400,000 |  | 2,400,000 |  | 4,100,000
Accrued liabilities to related party |  |  |  |  | 1,100,000
Deferred revenue | 19,700,000 |  | 19,700,000 |  | 7,500,000
Falikang [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Accounts receivable from related party | 20,700,000 |  | 20,700,000 |  |
Investment income | 300,000 |  | 700,000 |  |
Equity method investments | 3,400,000 |  | $ 3,400,000 |  | 2,700,000
Percentage of outstanding shares owned |  |  | 51.10% |  |
Miscellaneous receivables | 0 |  | $ 0 |  | $ 900,000
Falikang [Member] | Collaborative Arrangement [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue related to collaboration agreements | $ 10,300,000 |  | $ 32,500,000 |  |

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