Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Royalties	$ 0	$ 0	$ 0	$ 0
Costs and expenses:
Research and development	836,582	696,287	1,342,957	1,257,536
General and administrative	1,015,701	601,502	1,645,603	1,698,248
Costs and expenses	1,852,283	1,297,789	2,988,560	2,955,784
Interest (income) expense	(443)	9,165,429	(833)	10,041,292
Net loss	(1,851,840)	(10,463,218)	(2,987,727)	(12,997,076)
Dividends on Series A convertible preferred stock	0	(83,750)	0	(335,000)
Net loss attributable to common shareholders	$ (1,851,840)	$ (10,546,968)	$ (2,987,727)	$ (13,332,076)
Net loss per share (basic and diluted)	$ (0.07)	$ (0.56)	$ (0.12)	$ (0.86)
Weighted average number of common shares outstanding (basic and diluted)	27,023,038	18,979,559	25,200,535	15,568,841