Statements of Operations (USD $)	3 Months Ended		6 Months Ended		119 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013
Operating expenses:
Research and development	$ 4,084,521	$ 848,504	$ 7,246,247	$ 1,613,340	$ 18,691,915
General and administrative	1,071,426	983,045	3,238,893	1,372,152	12,723,689
Total operating expenses	5,155,947	1,831,549	10,485,140	2,985,492	31,415,604
Loss from operations	(5,155,947)	(1,831,549)	(10,485,140)	(2,985,492)	(31,415,604)
Other income		11,890	30,649	12,460	966,167
Other expense				(35)	(9,705)
Interest expense	(297,935)	(28,744)	(505,037)	(50,038)	(801,987)
Interest income	3,244	3,564	3,244	7,882	963,827
Net loss from operations	(5,450,638)	(1,844,839)	(10,956,284)	(3,015,223)	(30,297,302)
Less accretion of preferred stock dividends					(2,591,165)
Add discount on redemption of preferred stock					12,171,765
Net loss attributable to common stockholders	$ (5,450,638)	$ (1,844,839)	$ (10,956,284)	$ (3,015,223)	$ (20,716,702)
Net loss attributable to common stockholders per common share:
Basic and Diluted (in dollars per share)	$ (0.55)	$ (0.54)	$ (1.37)	$ (0.88)
Weighted-average shares outstanding:
Basic and Diluted (in shares)	9,837,062	3,441,995	8,014,529	3,441,995