Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Grant revenue	$ 2,586,000	$ 4,338,000
Licensing and collaboration revenue	175,000	1,370,000
Total operating revenues	2,761,000	5,708,000
Operating expenses:
Research and development	15,725,000	21,937,000
General and administrative	8,234,000	9,164,000
Total operating expenses	23,959,000	31,101,000
Loss from operations	(21,198,000)	(25,393,000)
Other income and expense:
Miscellaneous expense	(4,000)	0
Interest income	85,000	46,000
Interest expense	(106,000)	(7,000)
Other (expense) income, net	(25,000)	39,000
Net loss before taxes	(21,223,000)	(25,354,000)
Income tax benefit	310,000	1,634,000
Net loss	$ (20,913,000)	$ (23,720,000)
Basic and diluted loss per share	$ (0.72)	$ (0.82)
Basic and diluted average shares outstanding	29,213,488	28,856,944