Segment Reporting and Significant Customers

12 Months Ended

Dec. 31, 2018

Segment Reporting and Significant Customers

Operating segments are defined as components of an enterprise for which separate discrete financial information is available and evaluated regularly by the chief operating decision maker, or decision-making group, in deciding how to allocate resources and in assessing performance. We globally manage the business within one reporting segment, the development and commercialization of innovative and minimally invasive solutions for patients with obstructive sleep apnea. Segment information is consistent with how management reviews the business, makes investing and resource allocation decisions and assesses operating performance.

Revenue by geographic region is as follows:


	Year Ended December 31,
	2018		2017		2016
United States	$	44,378	$	24,293	$	13,789
Europe	6,215		4,274		2,638
Total revenue	$	50,593	$	28,567	$	16,427

All of our long-lived assets are located in the U.S.