Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenue:
Collaboration and license revenue	$ 3,983,000	$ 9,238,000
Grant revenue	47,000	336,000
Total revenue	4,030,000	9,574,000
Operating expenses:
Research and development	20,927,000	10,646,000
General and administrative	8,999,000	6,210,000
Amortization of intangible assets	137,000	0
Total operating expenses	30,063,000	16,856,000
Loss from operations	(26,033,000)	(7,282,000)
Loss from remeasurement of fair value of warrants		(9,342,000)
Interest income	454,000
Other (loss) income, net	(22,000)	8,000
Loss before income tax	(25,601,000)	(16,616,000)
Provision for income taxes	3,226,000	0
Net loss	$ (28,827,000)	$ (16,616,000)
Net loss per common share, basic and diluted	$ (0.45)	$ (39.97)
Shares used in computing net loss per common share, basic and diluted	63,802,391	415,746