Summary of Significant Accounting Policies - Significant Geographical Locations Outside the United States (Details)	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2020
Revenue Benchmark \| Geographic Concentration Risk \| Germany
Disaggregation of Revenue [Line Items]
Revenue by significant geographical locations outside the United States	41.00%	32.00%

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
-Publisher FASB
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