CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		132 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013
Operating expenses:
Research and development	$ 1,956,966	$ 8,699,119	$ 164,461,812
Sales and marketing	359,284	4,968,762	24,605,660
General and administrative	1,607,064	1,920,111	32,510,222
Restructuring	0	0	2,157,795
Total operating expenses	3,923,314	15,587,992	223,735,489
Operating loss	(3,923,314)	(15,587,992)	(223,735,489)
Interest income	6,095	28,774	5,015,208
Interest expense	0	0	(258,348)
Net loss	$ (3,917,219)	$ (15,559,218)	$ (218,978,629)
Net loss per basic and diluted share of common stock (in dollars per share)	$ (0.06)	$ (0.23)
Weighted average number of basic and diluted common shares outstanding (in shares)	67,075,779	66,429,178