Statements of Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue	$ 33,820		$ 34,531
Operating expenses
Research and development	11,983	$ 12,070	46,912	$ 37,089
General and administrative	4,856	3,694	19,226	10,676
Total operating expenses	16,839	15,764	66,138	47,765
Income (loss) from operations	16,981	(15,764)	(31,607)	(47,765)
Other income (expense)
Interest income	346	101	723	376
Interest expense	(12)	(4)	(42)	(23)
Other Income	8,944		8,944
Net income (loss)	26,259	(15,667)	(21,982)	(47,412)
Total comprehensive income (loss) (Note 12)	$ 26,217	$ (15,699)	$ (21,960)	$ (47,425)
Basic net income (loss) per share (Note 5)	$ 0.19	$ (0.16)	$ (0.18)	$ (0.49)
Diluted net income (loss) per share (Note 5)	$ 0.19	$ (0.16)	$ (0.18)	$ (0.49)
Basic weighted average shares outstanding	136,439	99,031	121,896	97,622
Diluted weighted average shares outstanding	140,024	99,031	121,896	97,622