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Income Taxes - Addtional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Tax [Line Items]      
Operating Loss Carryforwards $ 14,779,928us-gaap_OperatingLossCarryforwards    
Deferred Tax Assets, Tax Credit Carryforwards, Research 668,611us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch 520,891us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch 383,067us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount 1,530,234us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance 945,347us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance 1,056,770us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Research and Development Expense [Member]      
Income Tax [Line Items]      
Deferred Tax Assets, Tax Credit Carryforwards, Research $ 668,611us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember		    
Minimum [Member]      
Income Tax [Line Items]      
Operating Loss Carry forwards Expiration Period 2028    
Maximum [Member]      
Income Tax [Line Items]      
Operating Loss Carry forwards Expiration Period 2034