Annual report pursuant to Section 13 and 15(d)

Short Term Notes Payable - Summary of Short Term Notes Payable (Parenthetical) (Detail)

v2.4.1.9
Short Term Notes Payable - Summary of Short Term Notes Payable (Parenthetical) (Detail) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Product Liability Insurance Financing [Member]    
Short-term Debt [Line Items]    
Short term note payable $ 50,694us-gaap_DebtInstrumentFaceAmount
/ us-gaap_ShortTermDebtTypeAxis
= ogen_ProductLiabilityInsuranceFinancingMember 		$ 50,037us-gaap_DebtInstrumentFaceAmount
/ us-gaap_ShortTermDebtTypeAxis
= ogen_ProductLiabilityInsuranceFinancingMember
Monthly installment including principal and interest 5,223us-gaap_DebtInstrumentPeriodicPayment
/ us-gaap_ShortTermDebtTypeAxis
= ogen_ProductLiabilityInsuranceFinancingMember 		5,155us-gaap_DebtInstrumentPeriodicPayment
/ us-gaap_ShortTermDebtTypeAxis
= ogen_ProductLiabilityInsuranceFinancingMember
Interest Rate bearing 6.57%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_ShortTermDebtTypeAxis
= ogen_ProductLiabilityInsuranceFinancingMember 		6.57%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_ShortTermDebtTypeAxis
= ogen_ProductLiabilityInsuranceFinancingMember
Maturity date Jan. 10, 2015 Jan. 10, 2014
Directors' and Officers' Liability Insurance Financing [Member]    
Short-term Debt [Line Items]    
Short term note payable 108,306us-gaap_DebtInstrumentFaceAmount
/ us-gaap_ShortTermDebtTypeAxis
= ogen_DirectorsAndOfficerLiabilityInsuranceMember 		106,994us-gaap_DebtInstrumentFaceAmount
/ us-gaap_ShortTermDebtTypeAxis
= ogen_DirectorsAndOfficerLiabilityInsuranceMember
Monthly installment including principal and interest $ 10,076us-gaap_DebtInstrumentPeriodicPayment
/ us-gaap_ShortTermDebtTypeAxis
= ogen_DirectorsAndOfficerLiabilityInsuranceMember 		$ 9,954us-gaap_DebtInstrumentPeriodicPayment
/ us-gaap_ShortTermDebtTypeAxis
= ogen_DirectorsAndOfficerLiabilityInsuranceMember
Interest Rate bearing 4.64%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_ShortTermDebtTypeAxis
= ogen_DirectorsAndOfficerLiabilityInsuranceMember 		4.64%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_ShortTermDebtTypeAxis
= ogen_DirectorsAndOfficerLiabilityInsuranceMember
Maturity date Jun. 24, 2015 Jun. 24, 2014