Information about Geographic Areas (Tables)

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Classification of Revenue by Geography

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):

	2018		2017		2016
Americas	$	74,137	$	86,099	$	60,330
Europe & Middle East	25,715		21,791		18,497
Asia Pacific	6,880		7,015		7,662
Total revenue	$	106,732	$	114,905	$	86,489