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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, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | $ 50,641 | $ 44,319 | $ 106,544 | $ 80,480
Product Revenue, Net [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | 49,643 | 23,889 | 80,181 | 48,049
Product Revenue, Net [Member] | Direct Sales [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Gross revenue | 4,046 | 3,607 | 7,831 | 6,667
Total revenue | 3,638 | 3,377 | 7,063 | 6,165
Product Revenue, Net [Member] | Direct Sales [Member] | Discounts and Rebates [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | (408) | (229) | (767) | (503)
Product Revenue, Net [Member] | Direct Sales [Member] | Sales Returns [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | 0 | (1) | (1) | 1
Product Revenue, Net [Member] | Sales To Falikang [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | 46,005 | 20,512 | 73,118 | 41,884
Gross transaction price | 49,352 | 42,153 | 92,912 | 76,402
Product Revenue, Net [Member] | Sales To Falikang [Member] | Profit Share [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | (21,397) | (18,312) | (40,420) | (33,300)
Product Revenue, Net [Member] | Sales To Falikang [Member] | Net Transfer Price [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | 27,955 | 23,841 | 52,492 | 43,102
Product Revenue, Net [Member] | Sales To Falikang [Member] | Decrease (Increase) in Deferred Revenue [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | $ 18,050 | $ (3,329) | $ 20,626 | $ (1,218)

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