CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues:
Total revenues	$ 57,203,000	$ 63,274,000	$ 115,132,000	$ 191,678,000
Costs and expenses:
Cost of sales (excluding amortization of intangible assets)	2,124,000	2,753,000	4,699,000	14,797,000
Research and development expenses	1,263,000	2,180,000	3,056,000	3,708,000
Selling, general and administrative expenses	24,755,000	31,308,000	49,800,000	60,341,000
Amortization of intangible assets	25,443,000	25,444,000	50,887,000	50,888,000
Restructuring charges	0	5,814,000	0	14,831,000
Total costs and expenses	53,585,000	67,499,000	108,442,000	144,565,000
Income (loss) from operations	3,618,000	(4,225,000)	6,690,000	47,113,000
Other (expense) income:
Interest expense	(14,842,000)	(17,010,000)	(31,396,000)	(35,078,000)
Other (expense) income, net	(1,240,000)	67,000	(1,849,000)	296,000
Net (loss) income before income taxes	(12,464,000)	(21,168,000)	(26,555,000)	12,331,000
Income taxes (expense) benefit	(1,141,000)	120,000	(1,351,000)	445,000
Net (loss) income	$ (13,605,000)	$ (21,048,000)	$ (27,906,000)	$ 12,776,000
Basic net (loss) income per share (in dollars per share)	$ (0.21)	$ (0.33)	$ (0.43)	$ 0.20
Diluted net (loss) income per share (in dollars per share)	$ (0.21)	$ (0.33)	$ (0.43)	$ 0.20
Shares used in computing basic net (loss) income per share (in shares)	64,480	63,719	64,405	63,611
Shares used in computing diluted net (loss) income per share (in shares)	64,480	63,719	64,405	64,107
Product sales, net
Revenues:
Total revenues	$ 25,937,000	$ 26,838,000	$ 52,387,000	$ 71,192,000
Commercialization agreement, net
Revenues:
Total revenues	31,003,000	31,179,000	61,859,000	114,979,000
Royalties and milestones
Revenues:
Total revenues	$ 263,000	$ 5,257,000	$ 886,000	$ 5,507,000