Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue:
Collaboration and license revenue	$ 3,794,000	$ 18,720,000	$ 46,715,000	$ 37,581,000
Grant revenue		426,000	88,000	1,022,000
Total revenue	3,794,000	19,146,000	46,803,000	38,603,000
Operating expenses:
Research and development	19,046,000	11,813,000	66,855,000	35,992,000
General and administrative	8,556,000	6,908,000	26,255,000	19,000,000
Amortization of intangible assets	138,000	0	415,000	0
Total operating expenses	27,740,000	18,721,000	93,525,000	54,992,000
Income (loss) from operations	(23,946,000)	425,000	(46,722,000)	(16,389,000)
Loss from remeasurement of fair value of warrants				(26,077,000)
Interest income, net	566,000	139,000	1,540,000	156,000
Other (loss) income, net	(1,000)	3,000	(32,000)	1,000
Income (loss) before income tax	(23,381,000)	567,000	(45,214,000)	(42,309,000)
Provision for income taxes	11,670,000	0	16,368,000	0
Net income (loss)	$ (35,051,000)	$ 567,000	$ (61,582,000)	$ (42,309,000)
Net income (loss) per common share, basic	$ (0.54)	$ 0.01	$ (0.96)	$ (1.09)
Net income (loss) per common share, diluted	$ (0.54)	$ 0.01	$ (0.96)	$ (1.09)
Shares used in computing net loss per common share, basic	65,134,102	62,274,438	64,472,947	38,674,889
Shares used in computing net loss per common share, diluted	65,134,102	71,726,118	64,472,947	38,674,889