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Stock-Based Compensation (Summary Of Stock Compensation Expense) (Details) (USD $)
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3 Months Ended | 6 Months Ended | 141 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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Dec. 31, 2012
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||||
| Share Based Compensation | $ 50,752 | $ 170,178 | $ 141,926 | $ 372,167 | $ 5,719,555 |
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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 | 34,848 | 132,821 | 74,165 | 259,023 | 2,569,565 |
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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 | 20,469 | 21,797 | 40,967 | 45,841 | 1,013,016 |
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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 | (727) | 11,529 | 22,495 | 47,178 | 809,018 |
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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 | $ (3,838) | $ 4,031 | $ 4,299 | $ 20,125 | $ 1,327,956 |