Condensed Consolidated Statement of Stockholders' Equity (Unaudited) (USD $)	Total	Common Shares Shares Issued	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2010	$ 167,764,354	$ 13,879	$ 302,533,344	$ (127,268,545)	$ (7,514,324)
Beginning balance, shares at Dec. 31, 2010		13,878,686
Issuance of common stock pursuant to share-based awards, shares		47,298
Issuance of common stock pursuant to share-based awards	599,614	47	599,567
Share-based compensation	6,436,813		6,436,813
Net loss	(19,527,046)			(19,527,046)
Other comprehensive loss:
Foreign currency translation adjustments	91,445				91,445
Unrealized loss on investments	(25,307)				(25,307)
Ending balance at Jun. 30, 2011	$ 155,339,873	$ 13,926	$ 309,569,724	$ (146,795,591)	$ (7,448,186)
Ending balance, shares at Jun. 30, 2011		13,925,984