Segment and Enterprise-wide Information - Concentration (Details)	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Amazon.com \| Sales Revenue, Net \| Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	18.00%	20.90%	15.90%	12.10%

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://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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