Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Net revenues	$ 7,771	$ 17,465
Operating expenses:
Cost of revenues	2,737	9,978
Research and development	40,366	26,444
Selling, general and administrative	28,951	40,457
Total operating expenses	72,054	76,879
Loss from operations	(64,283)	(59,414)
Co-promotion and license income	228	757
Loss on short-term investment	(29,989)	0
Interest expense	(12,077)	(12,422)
Other income	2,369	111
Loss from continuing operations before income taxes	(103,752)	(70,968)
Benefit from (provision for) income taxes	18,916	(28)
Loss from continuing operations	(84,836)	(70,996)
Income (loss) from discontinued operations, net of tax	113,985	(31,674)
Net income (loss)	$ 29,149	$ (102,670)
Basic (loss) earnings per common share:
Loss from continuing operations (USD per share)	$ (1.15)	$ (1.00)
Earnings (loss) from discontinued operations (USD per share)	1.54	(0.44)
Basic earnings (loss) per share (USD per share)	0.39	(1.44)
Diluted (loss) earnings per common share:
Loss from continuing operations (USD per share)	(1.15)	(1.00)
Earnings (loss) from discontinued operations (USD per share)	1.54	(0.44)
Diluted earnings (loss) per share (USD per share)	$ 0.39	$ (1.44)
Weighted average number of common shares outstanding:
Basic (shares)	73,802	71,073
Diluted (shares)	73,802	71,073