Cash and cash equivalents at carrying value denominated In RMB .

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Amount of gains (losses) on intra-entity foreign currency transactions that are of a long-term-investment nature.

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Represents the percentage, calculated by dividing sales return provision by private pay market sales amount.

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Significant accounting policies line items.

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of liability for consideration received or receivable from customer which is not included in transaction price, when consideration is expected to be refunded to customer.

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Amount of the cumulative effect on retained earnings net of related income tax effect.

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Amount of cost for defined contribution plan.

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Portion of the carrying amount as of the balance sheet date of obligations due all related parties that is payable after one year or beyond the normal operating cycle if longer.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Significant Accounting Policies - Additional Information (Details) $ in Thousands, ¥ in Millions		12 Months Ended
	Jan. 01, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)	Dec. 31, 2015 USD ($)
Significant Accounting Policies [Line Items]
Cash and cash equivalents and restricted cash		$ 158,170	$ 115,964	$ 65,441			$ 65,460
Cash and cash equivalents		158,170	114,415	62,434
Restricted cash		0	1,549	3,007
Sales (note 21)	$ 3,888	229,650	174,346	72,431
Advertising Expense		3,901	4,007	3,336
Defined Contribution Plan, Cost Recognized		7,438	6,197	5,473
Foreign Currency Transaction Gain (Loss), before Tax		559	1,323	942
Gains Losses On Intra-entity Foreign Currency Transactions Long Term Investment Nature		268	336	(335)
Cash and Cash Equivalents, at Carrying Value, Total		70,448	103,370		¥ 484	¥ 673
Due to Related Parties, Noncurrent		6,705	7,070
Interest Rate Risk [Member]
Significant Accounting Policies [Line Items]
Due to Related Parties, Noncurrent		6,705
Inactivated Hepatitis A Vaccine And Combined Inactivated Hepatitis A And B Vaccine [Member]
Significant Accounting Policies [Line Items]
Revenue Recognition, Sales Returns, Reserve for Sales Returns		$ 2,880	$ 4,672
Percentage Of Sales Return Provision Of Private Pay Market Sales		1.40%	3.10%
Seasonal Influenza Vaccine [Member]
Significant Accounting Policies [Line Items]
Revenue Recognition, Sales Returns, Reserve for Sales Returns		$ 0	$ 263
Shipping and Handling [Member]
Significant Accounting Policies [Line Items]
Shipping, Handling and Transportation Costs		$ 6,261	5,759	$ 1,654
ASC Topic 606
Significant Accounting Policies [Line Items]
Cumulative effect of adoption to opening balance of retained earnings			$ 0
Use Rights [Member] \| Minimum [Member]
Significant Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life		28 years
Use Rights [Member] \| Maximum [Member]
Significant Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life		49 years