CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		144 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014
Operating expenses:
Research and development	$ 4,223,591	$ 1,956,966	$ 177,096,194
Sales and marketing	1,483,001	359,284	26,818,430
General and administrative	2,468,916	1,607,064	38,349,620
Restructuring	(98,049)	0	2,059,746
Total operating expenses	8,077,459	3,923,314	244,323,990
Operating loss	(8,077,459)	(3,923,314)	(244,323,990)
Interest income	3,799	6,095	5,031,035
Interest expense	0	0	(258,348)
Net loss	$ (8,073,660)	$ (3,917,219)	$ (239,551,303)
Net loss per basic and diluted share of common stock (in dollars per share)	$ (0.10)	$ (0.06)
Weighted average number of basic and diluted common shares outstanding (in shares)	78,438,816	67,075,779