CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Total revenues	$ 57,929,000	$ 128,404,000
Costs and expenses:
Cost of sales (excluding amortization of intangible assets)	2,575,000	12,044,000
Research and development expenses	1,793,000	1,528,000
Selling, general and administrative expenses	25,045,000	29,033,000
Amortization of intangible assets	25,444,000	25,444,000
Restructuring charges	0	9,017,000
Total costs and expenses	54,857,000	77,066,000
Income from operations	3,072,000	51,338,000
Other (expense) income:
Interest income and other (expense) income, net	(609,000)	229,000
Interest (expense)	(16,554,000)	(18,068,000)
Net (loss) income before income taxes	(14,091,000)	33,499,000
Income taxes (expense) benefit	(210,000)	325,000
Net (loss) income	$ (14,301,000)	$ 33,824,000
Basic net income (loss) per share (in dollars per share)	$ (0.22)	$ 0.53
Diluted net income (loss) per share (in dollars per share)	$ (0.22)	$ 0.48
Shares used in computing basic net income (loss) per share (in shares)	64,239	63,503
Shares used in computing diluted net income (loss) per share (in shares)	64,239	81,877
Product sales, net
Revenues:
Total revenues	$ 26,450,000	$ 44,354,000
Commercialization agreement, net
Revenues:
Total revenues	30,856,000	83,800,000
Royalties and milestones
Revenues:
Total revenues	$ 623,000	$ 250,000