Consolidated Statements of Operations (USD $)	12 Months Ended		85 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012
Operating expenses:
Research and development	$ 6,375,795	$ 4,102,847	$ 15,259,629
General and administrative	6,403,656	4,555,872	14,655,193
Total operating expenses	12,779,451	8,658,719	29,914,822
Operating loss	(12,779,451)	(8,658,719)	(29,914,822)
Other income (expense):
Other income			383,000
Interest income	35,184	8,759	55,233
Interest expense	(71,726)	(12,676)	(1,138,057)
Derivatives gain (loss)	17,479,674	(26,065,579)	(12,538,487)
Other income (expense), net	17,443,132	(26,069,496)	(13,238,311)
Net income (loss)	$ 4,663,681	$ (34,728,215)	$ (43,153,133)
Net income (loss) per share, basic	$ 0.07	$ (0.67)	$ (1.22)
Net income (loss) per share, diluted	$ 0.06	$ (0.67)	$ (1.22)
Weighted average number of common shares outstanding, basic	63,226,899	51,894,871	35,348,456
Weighted average number of common shares outstanding, diluted	71,919,419	51,894,871	35,348,456