Information about Geographic Areas

12 Months Ended

Dec. 31, 2017

The following table is based on the geographic location of distributors or end users who purchased products and services and collaborators. For sales to distributors, their geographic location may be different from the geographic locations of the ultimate end user. Revenue by geography as of December 31 was as follows (in thousands):



	2017		2016		2015
Americas	$	86,099	$	60,330	$	41,265
Europe & Middle East	21,791		18,497		14,807
Asia Pacific	7,015		7,662		6,595
Total revenue	$	114,905	$	86,489	$	62,667

Total revenue in the United States was $84.0 million, $58.0 million and $37.9 million for the years ended December 31, 2017, 2016 and 2015, respectively. The Company’s assets are primarily located in the United States and not allocated to any specific geographic region. Substantially all of the Company’s long-lived assets are located in the United States.