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Income Taxes (Schedule Of Deferred Tax Assets And Valuation Allowance) (Details) (USD $)
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Sep. 30, 2013
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Dec. 31, 2012
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|---|---|---|
| Income Taxes [Abstract] | ||
| Net Operating Loss Carryforwards | $ 26,094,100 | $ 24,094,200 |
| Stock option expense | 2,000,400 | 1,843,000 |
| Book tax differences on assets and liabilities | 346,900 | 352,500 |
| Valuation Allowance | $ (28,441,400) | $ (26,289,700) |