CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenue:
Royalty revenue from a related party, net of amortization for capitalized fees paid to a related party of $3,456 for the three months ended March 31, 2016 and 2015	$ 23,955	$ 6,674
Revenue from collaborative arrangements from a related party, net	221	222
Total net revenue	24,176	6,896
Operating expenses:
Research and development	392	712
General and administrative	6,252	5,439
Total operating expenses	6,644	6,151
Income from operations	17,532	745
Other income (expense), net	(32)	1,178
Interest income	92	116
Interest expense	(13,157)	(12,706)
Net income (loss)	$ 4,435	$ (10,667)
Basic and diluted net income (loss) per share	$ 0.04	$ (0.09)
Shares used to compute basic and diluted net income (loss) per share:
Shares used to compute basic net income (loss) per share	112,482	114,658
Shares used to compute diluted net income (loss) per share	113,178	114,658
Cash dividend declared per common share (in dollars per share)	$ 0	$ 0.25