Segment Information (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Schedule of Selected Information for Each Business Segment

Selected information regarding the Company’s segments are provided as follows:

	Year Ended December 31,
(in thousands)	2017			2016			2015
Revenues from external customers
U.S.	$	290,002		$	257,420		$	235,824
International	41,376			44,433			57,637
Total revenues from external customers	$	331,378		$	301,853		$	293,461
Revenues by product
DEFINITY	$	157,268		$	131,612		$	111,859
TechneLite	104,644			99,217			72,562
Xenon	31,377			29,086			48,898
Other	38,089			41,938			60,142
Total revenues	$	331,378		$	301,853		$	293,461
Geographical revenues
U.S.	$	290,002		$	257,420		$	235,824
Canada	18,770			18,918			28,340
All other	22,606			25,515			29,297
Total revenues	$	331,378		$	301,853		$	293,461
Operating income
U.S.	$	49,239		$	46,909		$	42,008
International	2,614			9,679			522
Operating income	51,853			56,588			42,530
Interest expense	18,410			26,618			38,715
Debt retirement costs	—			1,896			—
Loss on extinguishment of debt	2,442			—			15,528
Other (income) expense	(8,638		)	(220		)	65
Income (loss) before income taxes	$	39,639		$	28,294		$	(11,778	)
Depreciation and amortization
U.S.	$	17,672		$	15,995		$	17,054
International	517			1,335			1,850
Total depreciation and amortization	$	18,189		$	17,330		$	18,904

	December 31,
(in thousands)	2017		2016
Long-lived assets
U.S.	$	91,537	$	92,650
International	1,462		1,537
Total long-lived assets	$	92,999	$	94,187