CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Product sales, net	$ 100,232	$ 116,517	$ 190,517	$ 221,088
Royalties	225	165	387	374
Total revenues	100,457	116,682	190,904	221,462
Costs and expenses:
Cost of sales (excluding amortization of intangible assets)	19,725	20,965	37,499	44,514
Research and development expenses	5,614	7,116	10,698	13,065
Selling, general and administrative expenses	50,010	51,903	98,529	104,462
Amortization of intangible assets	25,735	27,037	51,470	54,074
Restructuring charges	3,441		3,441
Total costs and expenses	104,525	107,021	201,637	216,115
(Loss) Income from operations	(4,068)	9,661	(10,733)	5,347
Other (expense) income:
Interest and other income	282	67	532	197
Loss on prepayment of Senior Notes	(5,364)	(5,777)	(5,364)	(5,777)
Interest expense	(17,758)	(20,148)	(37,882)	(42,875)
Total other expense	(22,840)	(25,858)	(42,714)	(48,455)
Net income (loss) before income taxes	(26,908)	(16,197)	(53,447)	(43,108)
Benefit from income taxes	249	5,656	47	11,650
Net loss	$ (26,659)	$ (10,541)	$ (53,400)	$ (31,458)
Basic and diluted net loss per share (in dollars per share)	$ (0.43)	$ (0.17)	$ (0.86)	$ (0.52)
Shares used in computing basic and diluted net loss per share (in shares)	62,531,696	61,166,044	62,331,471	61,032,155