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Stock-based Compensation (Key Weighted-Average Assumptions) (Details) (Stock Options [Member], USD $)
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9 Months Ended | |
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Sep. 30, 2012
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Sep. 30, 2011
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Stock Options [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Expected dividend yield | 0.00% | 0.00% |
| Expected stock price volatility | 106.40% | 99.10% |
| Risk-free interest rate | 0.80% | 2.30% |
| Expected term | 5 years 4 months 24 days | 5 years 10 months 24 days |
| Weighted-average grant date fair-value | $ 0.24 | $ 0.99 |