CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		6 Months Ended		123 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012
Operating expenses:
Research and development	$ 4,695,546	$ 10,681,032	$ 13,394,664	$ 22,139,974	$ 159,155,088
Sales and marketing	1,753,166	1,324,217	6,721,928	2,435,347	23,746,504
General and administrative	1,441,167	1,317,454	3,361,278	2,650,170	28,584,951
Total operating expenses	7,889,879	13,322,703	23,477,870	27,225,491	211,486,543
Operating loss	(7,889,879)	(13,322,703)	(23,477,870)	(27,225,491)	(211,486,543)
Interest income	17,594	51,316	46,368	85,898	4,987,887
Interest expense	0	0	0	0	(258,348)
Net loss	$ (7,872,285)	$ (13,271,387)	$ (23,431,502)	$ (27,139,593)	$ (206,757,004)
Net loss per basic and diluted share of common stock	$ (0.12)	$ (0.21)	$ (0.35)	$ (0.46)
Weighted average number of basic and diluted common shares outstanding	67,040,569	61,847,065	66,734,874	58,373,101