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Income Taxes (Schedule of Deferred Tax Assets) (Details) (USD $)
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Dec. 31, 2014
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Dec. 31, 2013
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| Deferred tax assets: | ||
| Net operating loss carryforwards | $ 50,117,798us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | $ 37,191,826us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
| R&D credit carryforwards | 8,394,408us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch | 7,388,463us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch |
| Stock compensation | 1,849,847us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 1,962,472us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost |
| Intangibles | 1,931,193us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets | 2,206,593us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets |
| Temporary differences | 910,354us-gaap_DeferredTaxAssetsOther | 455,767us-gaap_DeferredTaxAssetsOther |
| Deferred tax assets before valuation allowance | 63,203,600us-gaap_DeferredTaxAssetsGross | 49,205,121us-gaap_DeferredTaxAssetsGross |
| Valuation allowance | (63,203,600)us-gaap_DeferredTaxAssetsValuationAllowance | (49,205,121)us-gaap_DeferredTaxAssetsValuationAllowance |
| Net deferred tax assets | $ 0us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 0us-gaap_DeferredTaxAssetsLiabilitiesNet |
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from intangible assets including goodwill. No definition available.
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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