CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
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 June 30, 2017 and 2016 and $6,912 for the six months ended June 30, 2017 and 2016	$ 58,341	$ 32,251	$ 98,612	$ 56,206
Revenue from collaborative arrangements from a related party	221	221	442	442
Total net revenue	58,562	32,472	99,054	56,648
Operating expenses:
Research and development	348	370	702	762
General and administrative	10,384	6,225	21,179	12,477
Total operating expenses	10,732	6,595	21,881	13,239
Income from operations	47,830	25,877	77,173	43,409
Other income (expense), net	(786)	1,719	(739)	1,687
Interest income	306	157	542	249
Interest expense	(12,204)	(13,156)	(24,985)	(26,313)
Net income	$ 35,146	$ 14,597	$ 51,991	$ 19,032
Basic net income per share	$ 0.33	$ 0.13	$ 0.48	$ 0.17
Diluted net income per share	$ 0.30	$ 0.13	$ 0.46	$ 0.17
Shares used to compute basic and diluted net income per share:
Shares used to compute basic net income per share	107,614	111,359	107,468	112,005
Shares used to compute diluted net income per share	120,463	124,316	120,317	112,531