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Income Taxes - Change in valuation allowance (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Valuation Allowance [Roll Forward]
Balance, December 31, 2011	$ (5,525,300)
Increase in valuation allowance	444,600	842,300
Balance, December 31, 2012	$ (5,969,900)	$ (5,525,300)

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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- Definition

The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period.

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