Segment Information

12 Months Ended

Jun. 30, 2018

(15) Segment Information

We predominantly operate in a single operating segment, which is the sleep and respiratory disorders sector of the medical device industry. Due to the acquisition of Brightree LLC in April 2016, our operations now include the supply of business management software and services to medical equipment and home health providers. However, these operations, both in terms of revenue and profit, are not material to our global operations and therefore have not been separately reported as a segment.

Sales of devices for each of the years ended June 30, 2018, 2017 and 2016, were $1,303.6 million, $1,161.0 million and $1,064.2 million, respectively. Sales of masks and other accessories for each of the years ended June 30, 2018, 2017 and 2016, were $879.6 million, $767.7 million and $745.6 million, respectively. We allocate revenue to a geographic area based on where the products are shipped to or where the services are performed. Revenue information by geographic area for the years ended June 30, 2018, 2017 and 2016, is summarized below (in thousands):


	Revenue from external sources for the years ended June 30,
	2018		2017		2016
United States	$	1,345,212	$	1,229,196	$	1,056,453
Rest of the World		994,984		837,541		782,260
Total	$	2,340,196	$	2,066,737	$	1,838,713

Long-lived assets of geographic areas are those assets used in our operations in each geographical area, and excludes goodwill, other intangible assets, and deferred tax assets. Long-lived assets by geographic area as of June 30, 2018, 2017 and 2016, is summarized below (in thousands):


	Long lived assets at June 30,
	2018		2017		2016
United States	$	142,337	$	150,677	$	148,789
Australia		173,394		183,159		185,978
Rest of the World		70,819		60,405		49,509
Total	$	386,550	$	394,241	$	384,276