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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
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Sep. 30, 2012
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Dec. 31, 2011
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| Stockholders' equity | |||||
| Series A convertible preferred stock, par value (in dollars per Share) | $ 0.001 | [1] | $ 0.001 | ||
| Series A convertible preferred stock, shares authorized (in Shares) | 2,000,000 | [1] | 2,000,000 | ||
| Series A convertible preferred stock, shares issued (in Shares) | 107,172 | [1] | 107,172 | ||
| Series A convertible preferred stock, shares outstanding (in Shares) | 107,172 | [1] | 107,172 | ||
| Common stock, par value (in dollars per Share) | $ 0.001 | [1] | $ 0.001 | ||
| Common stock, shares authorized (in Shares) | 500,000,000 | [1] | 500,000,000 | ||
| Common stock, shares issued (in Shares) | 91,735,662 | [1] | 91,670,192 | ||
| Common stock, shares outstanding (in Shares) | 91,735,662 | [1] | 91,670,192 | ||
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