Income Taxes (Details 2) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Income Tax [Line Items]
Net operating loss carryforwards	$ 39,555,984	$ 36,008,206
Stock based compensation expense	10,659,107	11,183,210
Tax credit carryforwards and other	5,717,023	1,139,961
Gross deferred tax assets	55,932,114	48,331,377
Valuation allowance	(55,932,114)	(48,331,377)
Net deferred tax assets	$ 0	$ 0

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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