Information about Geographic Areas

12 Months Ended

Dec. 31, 2019

The following table of total revenue is based on the geographic location of distributors or end users who purchase products and services and collaborators. For sales to distributors, their geographic location may be different from the geographic locations of the ultimate end user. For collaboration agreements, revenues are derived from partners located primarily in the United States. Americas consists of the United States, Canada, Mexico and South America; and Asia Pacific includes Japan, China, South Korea, Singapore, Malaysia, India, Vietnam, Thailand and Australia.

Revenue by geography as of December 31 was as follows (in thousands):



	2019		2018		2017
Americas	$	86,139	$	74,137	$	86,099
Europe & Middle East	30,289		25,715		21,791
Asia Pacific	9,140		6,880		7,015
Total revenue	$	125,568	$	106,732	$	114,905

Total revenue in the United States was $83.9 million, $71.2 million and $84.0 million for the years ended December 31, 2019, 2018 and 2017, 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.