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Stock-Based Compensation (Summary Of Stock Compensation Expense) (Details) (USD $)
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3 Months Ended | 9 Months Ended | 138 Months Ended | ||
|---|---|---|---|---|---|
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2012
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||||
| Share Based Compensation | $ 60,611 | $ 141,089 | $ 202,537 | $ 513,255 | $ 5,780,166 |
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Payroll [Member] | General And Administrative [Member]
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||||
| Share Based Compensation | 25,932 | 138,170 | 100,097 | 397,192 | 2,595,497 |
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Payroll [Member] | Research And Development [Member]
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|||||
| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||||
| Share Based Compensation | 18,973 | 23,706 | 59,940 | 69,546 | 1,031,989 |
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Consulting and other professional fees [Member] | General And Administrative [Member]
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||||
| Share Based Compensation | 10,470 | (16,915) | 32,965 | 30,265 | 819,488 |
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Consulting and other professional fees [Member] | Research And Development [Member]
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||||
| Share Based Compensation | $ 5,236 | $ (3,872) | $ 9,535 | $ 16,252 | $ 1,333,192 |