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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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