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Income Taxes (Details 2) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Summary of Deferred tax assets and liabilities
Stock-based compensation	$ 3,289,885	$ 2,629,271
Unrealized (gains) losses	(763,235)	(441,092)
Other assets and liabilities	(74,676)	(104,777)
Net deferred tax assets	$ 2,451,974	$ 2,083,402

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

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