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Variable Interest Entity - Summary of Equity Method Investment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Jun. 30, 2022 | Sep. 30, 2022 | Sep. 30, 2021
Acquisition And Variable Interest Entity [Line Items] |  |  |  |  |
Beginning balance |  |  | $ 3,825 | $ 3,825 |
Share of Net Income | $ 407 | $ 342 |  | 1,293 | $ 664
Ending balance | $ 4,631 |  |  | $ 4,631 |
Beijing Falikang Pharmaceutical Co. Ltd [Member] |  |  |  |  |
Acquisition And Variable Interest Entity [Line Items] |  |  |  |  |
Ownership Percentage | 51.10% |  |  | 51.10% |
Beginning balance | $ 4,631 |  | 3,825 | $ 3,825 |
Share of Net Income |  |  | 1,293 |  |
Currency Translation |  |  | (487) |  |
Ending balance |  |  | $ 4,631 |  |

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