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Collaboration Agreements, License Agreement and Revenues - Summary of Product Revenue, Net (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Disaggregation Of Revenue [Line Items] |  |
Total revenue | $ 36,161 | $ 60,827
Product Revenue, Net [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenue | 24,161 | 18,881
Product Revenue, Net [Member] | Direct Sales [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Gross revenue | 3,060 | 2,830
Total revenue | 2,789 | 2,658
Product Revenue, Net [Member] | Direct Sales [Member] | Discounts and Rebates [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenue | (273) | (175)
Product Revenue, Net [Member] | Direct Sales [Member] | Sales Returns [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenue | 2 | 3
Product Revenue, Net [Member] | Sales To Falikang [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenue | 21,372 | 16,223
Gross transfer price | 34,249 | 22,726
Product Revenue, Net [Member] | Sales To Falikang [Member] | Profit Share [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenue | (14,988) | (8,849)
Product Revenue, Net [Member] | Sales To Falikang [Member] | Net Transfer Price [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenue | 19,261 | 13,877
Product Revenue, Net [Member] | Sales To Falikang [Member] | Decrease in deferred revenue |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenue | $ 2,111 | $ 2,346

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