Segment Information

9 Months Ended

Sep. 30, 2017

The Company reports two operating segments, U.S. and International, based on geographic customer base. The results of these operating segments are regularly reviewed by the Company’s chief operating decision maker, the President and Chief Executive Officer. The Company’s segments derive revenues through the manufacture, marketing, selling and distribution of medical imaging products, focused primarily on cardiovascular diagnostic imaging. All goodwill has been allocated to the U.S. operating segment. The Company does not identify or allocate assets to its segments.

Selected information for each operating segment is as follows:



	Three Months Ended September 30,					Nine Months Ended September 30,
(in thousands)	2017			2016		2017			2016
Revenues from external customers
U.S.	$	69,579		$	62,621	$	218,706		$	192,687
International	10,362			10,442		31,431			34,816
Total revenues from external customers	$	79,941		$	73,063	$	250,137		$	227,503
Operating income
U.S.	$	12,243		$	11,649	$	40,306		$	35,941
International	579			946		2,340			8,506
Total operating income	12,822			12,595		42,646			44,447
Interest expense	4,442			6,792		14,147			20,799
Debt retirement costs	—			1,415		—			1,415
Loss on extinguishment of debt	—			—		2,161			—
Other (income) expense	(908		)	148		(2,037		)	(317		)
Income before income taxes	$	9,288		$	4,240	$	28,375		$	22,550