Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Grant revenue	$ 4,338	$ 9,649
Licensing and collaboration revenue	1,370	29,546
Total operating revenues	5,708	39,195
Operating expenses:
Research and development	21,937	17,981
General and administrative	9,164	8,366
Total operating expenses	31,101	26,347
(Loss) income from operations	(25,393)	12,848
Other income and expense:
Interest income	46	17
Interest expense	(7)	(6)
Other income, net	39	11
Net (loss) income before taxes	(25,354)	12,859
Income tax benefit (expense)	1,634	(1,669)
Net (loss) income	$ (23,720)	$ 11,190
Basic (loss) earnings per share	$ (0.82)	$ 0.40
Diluted (loss) earnings per share	$ (0.82)	$ 0.35
Basic average shares outstanding	28,856,944	28,218,631
Diluted average shares outstanding	28,856,944	31,919,318