CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Total revenues	$ 229,504	$ 311,770	$ 380,724
Costs and expenses:
Cost of sales (excluding amortization of intangible assets)	9,505	18,476	72,598
Research and development expenses	10,106	8,042	13,718
Acquired in-process research and development	0	0	24,900
Selling, general and administrative expenses	108,866	119,218	195,696
Amortization of intangible assets	101,774	101,774	102,745
Loss on impairment of intangible asset	189,790	0	0
Loss on impairment of intangible asset	189,790	0	0
Restructuring charges	3,891	20,601	13,247
Total costs and expenses	423,932	268,111	422,904
(Loss) income from operations	(194,428)	43,659	(42,180)
Other income (expense):
Litigation settlement	0	62,000	0
Gain on debt extinguishment	26,385	0	0
Other income, net	3,948	1,197	681
Interest expense	(58,389)	(68,881)	(73,552)
Gain on divestiture of Lazanda	0	0	17,064
Total other expense	(28,056)	(5,684)	(61,745)
Net (loss) income before income taxes	(222,484)	37,975	(103,925)
Income tax benefit (expense)	5,283	(1,067)	1,429
Net (loss) income	(217,201)	36,908	(102,496)
Unrealized gain on available-for-sale securities, net of tax	0	0	14
Other comprehensive income:
Unrealized gain on available-for-sale securities, net of tax	5		14
Comprehensive (loss) income	$ (217,201)	$ 36,908	$ (102,482)
Basic net (loss) income per share (in dollars per share)	$ (3.07)	$ 0.58	$ (1.63)
Diluted net (loss) income per share (in dollars per share)	$ (3.07)	$ 0.57	$ (1.63)
Shares used in computing basic net (loss) income per share (in shares)	70,716	63,794	62,702
Shares used in computing diluted net (loss) income per share (in shares)	70,716	64,208	62,702
Product sales, net
Revenues:
Total revenues	$ 108,806	$ 129,966	$ 379,880
Commercialization agreement, net
Revenues:
Total revenues	118,614	155,743	0
Royalties and milestones
Revenues:
Total revenues	2,084	26,061	844
Senior Notes
Other income (expense):
Loss on prepayment of Senior Notes	$ 0	$ 0	$ (5,938)