Annual report pursuant to Section 13 and 15(d)

Income Taxes (Schedule of Deferred Tax Assets) (Details)

v2.4.1.9
Income Taxes (Schedule of Deferred Tax Assets) (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
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