CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		6 Months Ended		135 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013
Operating expenses:
Research and development	$ 1,904,849	$ 4,695,546	$ 3,861,815	$ 13,394,664	$ 166,366,661
Sales and marketing	241,139	1,753,166	600,423	6,721,928	24,846,799
General and administrative	1,194,172	1,441,167	2,801,236	3,361,278	33,704,394
Restructuring	0	0	0	0	2,157,795
Total operating expenses	3,340,160	7,889,879	7,263,474	23,477,870	227,075,649
Operating loss	(3,340,160)	(7,889,879)	(7,263,474)	(23,477,870)	(227,075,649)
Interest income	4,276	17,594	10,371	46,368	5,019,484
Interest expense	0	0	0	0	(258,348)
Net loss	$ (3,335,884)	$ (7,872,285)	$ (7,253,103)	$ (23,431,502)	$ (222,314,513)
Net loss per basic and diluted share of common stock (in dollars per share)	$ (0.05)	$ (0.12)	$ (0.11)	$ (0.35)
Weighted average number of basic and diluted common shares outstanding (in shares)	67,094,460	67,040,569	67,085,171	66,734,874