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Variable Interest Entity - Summary of Equity Method Investment (Detail) - Beijing Falikang Pharmaceutical Co. Ltd [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Acquisition And Variable Interest Entity [Line Items]
Ownership Percentage	51.10%
Beginning balance	$ 2,728
Share of Net Loss	(240)
Currency Translation	(5)
Ending balance	$ 2,483

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