Condensed Statements of Operations (USD $)	3 Months Ended		52 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013
Operating expenses
Research and development	$ 356,696	$ 8,048,982	$ 48,490,692
General and administrative	1,325,412	1,131,193	12,199,982
Total operating expenses	1,682,108	9,180,175	60,690,674
Loss from operations	(1,682,108)	(9,180,175)	(60,690,674)
Other income (expense)
Interest expense, net	(4,573,911)		(5,283,355)
Other income	2,786	6,066	100,794
Net loss	(6,253,233)	(9,174,109)	(65,873,235)
Less dividends on preferred stock, not declared	(1,094,324)	(909,394)	(8,509,524)
Less beneficial conversion charge			(4,999,991)
Net loss attributable to common stockholders	$ (7,347,557)	$ (10,083,503)	$ (79,382,750)
Net loss per share (basic and diluted) (in dollars per share)	$ (3.08)	$ (6.18)
Weighted average shares outstanding (basic and diluted) (in shares)	2,383,444	1,631,727