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Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $)
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3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Jun. 30, 2012
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Jun. 30, 2011
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Jun. 30, 2012
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Jun. 30, 2011
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| 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) |