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Collaboration Agreements, License Agreement and Revenues - Summary of Product Revenue, Net (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disaggregation Of Revenue [Line Items] |  |  |
Total revenue | $ 147,752 | $ 140,734 | $ 235,309
Product Revenue, Net [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total revenue | 100,949 | 82,869 | 47,638
Product Revenue, Net [Member] | Direct Sales [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Gross revenue | 13,190 | 12,366 | 13,727
Total revenue | 11,894 | 11,702 | 12,070
Product Revenue, Net [Member] | Direct Sales [Member] | Discounts and Rebates [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total revenue | (1,298) | (665) | (1,740)
Product Revenue, Net [Member] | Direct Sales [Member] | Sales Returns [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total revenue | 2 | 1 | 83
Product Revenue, Net [Member] | Sales To Falikang [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total revenue | 89,055 | 71,167 | 35,568
Gross transaction price | 154,817 | 112,544 | 97,531
Product Revenue, Net [Member] | Sales To Falikang [Member] | Profit Share [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total revenue | (66,254) | (43,716) | (34,759)
Product Revenue, Net [Member] | Sales To Falikang [Member] | Net Transfer Price [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total revenue | 88,563 | 68,828 | 62,772
Product Revenue, Net [Member] | Sales To Falikang [Member] | Decrease (Increase) in Deferred Revenue [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total revenue | $ 492 | $ 2,339 | $ (27,204)

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