Annual report pursuant to Section 13 and 15(d)

Related Party Transactions - Additional Information (Detail)

v2.4.1.9
Related Party Transactions - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Related Party Transaction [Line Items]    
Deferred payments due to former directors $ 25,500us-gaap_DeferredCompensationLiabilityCurrent $ 25,500us-gaap_DeferredCompensationLiabilityCurrent
Deferred Payments Due to Former Directors [Member]    
Related Party Transaction [Line Items]    
Deferred payments due to former directors 25,500us-gaap_DeferredCompensationLiabilityCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
25,500us-gaap_DeferredCompensationLiabilityCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
Intrexon [Member]    
Related Party Transaction [Line Items]    
Percentage of outstanding common stock 24.40%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PrincipalOwnerMember
 
Intrexon [Member] | Lantibiotic Exclusive Channel Collaboration (ECC) [Member]    
Related Party Transaction [Line Items]    
Cash paid to Intrexon Corporation 866,030us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PrincipalOwnerMember
/ us-gaap_TypeOfArrangementAxis
= ogen_LantibioticEccMember
1,463,019us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PrincipalOwnerMember
/ us-gaap_TypeOfArrangementAxis
= ogen_LantibioticEccMember
Intrexon [Member] | Probiotics ECC [Member]    
Related Party Transaction [Line Items]    
Cash paid to Intrexon Corporation $ 46,892us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PrincipalOwnerMember
/ us-gaap_TypeOfArrangementAxis
= ogen_ProbioticsEccMember
$ 0us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PrincipalOwnerMember
/ us-gaap_TypeOfArrangementAxis
= ogen_ProbioticsEccMember