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Collaboration Agreements, License Agreement and Revenues - Summary of Product Revenue, Net (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | $ 44,319 | $ 29,806 | $ 80,480 | $ 90,633
Product Revenue, Net [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | 23,889 | 23,256 | 48,049 | 42,137
Product Revenue, Net [Member] | Direct Sales [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Gross revenue | 3,607 | 3,533 | 6,667 | 6,362
Total revenue | 3,377 | 3,519 | 6,165 | 6,178
Product Revenue, Net [Member] | Direct Sales [Member] | Discounts and Rebates [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | (229) | (13) | (503) | (187)
Product Revenue, Net [Member] | Direct Sales [Member] | Sales Returns [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | (1) | (1) | 1 | 3
Product Revenue, Net [Member] | Sales To Falikang [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | 20,512 | 19,737 | 41,884 | 35,959
Gross transfer price | 42,153 | 28,281 | 76,402 | 51,007
Product Revenue, Net [Member] | Sales To Falikang [Member] | Profit Share [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | (18,312) | (10,065) | (33,300) | (18,914)
Product Revenue, Net [Member] | Sales To Falikang [Member] | Net Transfer Price [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | 23,841 | 18,216 | 43,102 | 32,093
Product Revenue, Net [Member] | Sales To Falikang [Member] | Decrease (Increase) in Deferred Revenue [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | $ (3,329) | $ 1,521 | $ (1,218) | $ 3,866

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