Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v2.4.1.9
Income Taxes - Additional Information (Detail) (USD $)
1 Months Ended 12 Months Ended
Jun. 30, 2009
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Line Items]        
Valuation Allowance   $ 26,927,920us-gaap_DeferredTaxAssetsValuationAllowance $ 24,875,049us-gaap_DeferredTaxAssetsValuationAllowance  
Net change in valuation allowance related to deferred tax assets   2,052,871us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount 5,679,857us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount  
Federal and state tax net operating loss carryforwards   69,735,000us-gaap_OperatingLossCarryforwards    
Federal and state tax loss carryforward expiration date   Dec. 31, 2034    
Change in ownership 50.00%ogen_NetOperatingLossCarryforwardLimitationOnUsePercentageOwnershipChangeMinimum   50.00%ogen_NetOperatingLossCarryforwardLimitationOnUsePercentageOwnershipChangeMinimum  
Annual amount of pre-change net operating losses 417,000ogen_NetOperatingLossCarryforwardsPreChangeAnnualLimitation   3,540,000ogen_NetOperatingLossCarryforwardsPreChangeAnnualLimitation  
Additional unrecognized tax benefits   112,871us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 361,143us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions  
Tax positions   1,354,652us-gaap_UnrecognizedTaxBenefits 1,241,781us-gaap_UnrecognizedTaxBenefits 880,638us-gaap_UnrecognizedTaxBenefits
Interest and penalties   0us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense 0us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense  
Research and Development Tax Credit [Member]        
Income Tax Disclosure [Line Items]        
Federal research and development tax credit carryforwards   $ 1,355,000us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_TaxCreditCarryforwardAxis
= us-gaap_ResearchMember
   
Federal tax credit carryforward   Dec. 31, 2024