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Income Taxes (Details) (USD $) | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Deferred tax assets: |  |
Net operating losses | $ 13,609,036 | $ 13,089,314
Share-based compensation | 1,497,556 | 741,420
Other differences in tax basis | 233,043 | 4,749
Total deferred tax assets | 15,339,635 | 13,835,483
Less: valuation allowance | (15,339,635) | (13,835,483)
Deferred tax assets, net |  |

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