Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Statement Of Other Comprehensive Income [Abstract]
Net Loss	$ (6,479,554)	$ (6,752,668)	$ (13,062,656)	$ (13,995,868)
Other comprehensive (loss) income:
Foreign currency translation gain (loss)	(80,543)	(18,160)	(4,040)	86,032
Unrealized gain on available-for-sale securities				18,502
Comprehensive Loss	$ (6,560,097)	$ (6,770,828)	$ (13,066,696)	$ (13,891,334)