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Variable Interest Entity - Summary of Equity Method Investment (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Acquisition And Variable Interest Entity [Line Items] |  |
Beginning balance | $ 3,825 |
Share of Net Income | 320 | $ (240)
Ending balance | $ 4,155 |
Beijing Falikang Pharmaceutical Co. Ltd [Member] |  |
Acquisition And Variable Interest Entity [Line Items] |  |
Ownership Percentage | 51.10% |
Beginning balance | $ 3,825 |
Share of Net Income | 320 |
Currency Translation | 10 |
Ending balance | $ 4,155 |

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