CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		9 Months Ended		126 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012
Operating expenses:
Research and development	$ 2,479,471	$ 7,417,477	$ 15,874,135	$ 29,557,451	$ 161,634,559
Sales and marketing	221,399	2,203,898	6,943,327	4,639,245	23,967,903
General and administrative	1,169,157	1,278,085	4,530,435	3,928,255	29,754,108
Restructuring	2,218,347	0	2,218,347	0	2,218,347
Total operating expenses	6,088,374	10,899,460	29,566,244	38,124,951	217,574,917
Operating loss	(6,088,374)	(10,899,460)	(29,566,244)	(38,124,951)	(217,574,917)
Interest income	12,076	45,222	58,444	131,120	4,999,964
Interest expense	0	0	0	0	(258,348)
Net loss	$ (6,076,298)	$ (10,854,238)	$ (29,507,800)	$ (37,993,831)	$ (212,833,301)
Net loss per basic and diluted share of common stock (in dollars per share)	$ (0.09)	$ (0.18)	$ (0.44)	$ (0.64)
Weighted average number of basic and diluted common shares outstanding (in shares)	67,040,569	61,847,700	66,837,516	59,544,028