For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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Data Type:	num:percentItemType
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Geographic Information and Concentrations - Concentration Risk (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fosun Pharma
Concentration Risk [Line Items]
Percentage of revenue	57.00%		29.00%
XuanZhu
Concentration Risk [Line Items]
Percentage of revenue	28.00%
KKC
Concentration Risk [Line Items]
Percentage of revenue	15.00%	11.00%	71.00%
Knight
Concentration Risk [Line Items]
Percentage of revenue		89.00%