CONDENSED CONSOLIDATED STATEMENTS OF INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Net sales	$ 16,389	$ 18,385	$ 49,119	$ 46,796
Cost of sales (excluding amortization, shown separately below)	3,906	15,833	9,745	39,653
Gross profit	12,483	2,552	39,374	7,143
Research and development expenses	3,735	3,808	7,032	8,237
Selling, general, and administrative expenses	13,435	14,546	29,866	34,212
Amortization of intangibles	10,445	9,899	20,890	19,798
Change in fair value of contingent consideration	(1,211)	(300)	(996)	(3,400)
Operating loss	(13,921)	(25,401)	(17,418)	(51,704)
Other income (expense)	215	(1)	255	54
Gain (loss) on foreign currency exchange	7,968	(1,072)	11,071	(242)
Interest expense, net	(8,564)	(14,316)	(18,857)	(29,324)
Loss before income taxes	(14,302)	(40,790)	(24,949)	(81,216)
Income tax benefit	(16,909)	(15,626)	(15,527)	(30,915)
Net income (loss)	$ 2,607	$ (25,164)	$ (9,422)	$ (50,301)
Net income (loss) per share:
Basic (in dollars per share)	$ 0.05	$ (0.51)	$ (0.19)	$ (1.02)
Diluted (in dollars per share)	$ 0.05	$ (0.51)	$ (0.19)	$ (1.02)
Weighted average shares outstanding:
Basic (in shares)	49,670,621	49,279,167	49,941,993	49,294,817
Diluted (in shares)	50,035,343	49,279,167	49,941,993	49,294,817