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Segment Reporting (Tables)
 12 Months Ended
Dec. 31, 2018
Segment Reporting [Abstract]  
Revenue by Geographic Area

Revenue by geographic area is based on the headquarters or shipping locations of our partners. The following table sets forth revenue by geographic area (in thousands):

 

 

 

Year Ended December 31,

 

 

 

2018

 

 

2017

 

 

2016

 

United States

 

$

1,090,794

 

 

$

190,810

 

 

$

39,147

 

Europe

 

 

102,529

 

 

 

116,901

 

 

 

126,289

 

Total revenue

 

$

1,193,323

 

 

$

307,711

 

 

$

165,436