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Equity method investment - Variable Interest Entity - Summary of Equity Method Investment (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Acquisition And Variable Interest Entity [Line Items] |  |
Beginning balance | $ 5,061 |
Share of Net Income | 796 | $ 320
Ending balance | $ 5,884 |
Beijing Falikang Pharmaceutical Co. Ltd [Member] |  |
Acquisition And Variable Interest Entity [Line Items] |  |
Ownership Percentage | 51.10% |
Beginning balance | $ 5,061 |
Share of Net Income | 796 |
Currency Translation | 27 |
Ending balance | $ 5,884 |

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