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
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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
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-Name Accounting Standards Codification
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Data Type:	num:percentItemType
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Period Type:	duration

Summary of Significant Accounting Policies - Concentrations (Details) - item	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Total net revenue \| Customer 1
Concentrations
Concentration risk (as a percentage)	100.00%	100.00%	99.00%	89.00%
Total net revenue \| Customer risk \| One major pharmaceutical distributors
Concentrations
Number of major distributors	1		1
Total accounts receivable \| Customer 1
Concentrations
Concentration risk (as a percentage)			100.00%		99.00%