Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Additional Information (Detail)

v2.4.1.9
Significant Accounting Policies - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2015
Customer
Dec. 31, 2014
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]    
Number of dental distributor with guaranteed rights of returns 2ogen_NumberOfDentalDistributorWithGuaranteedRightsOfReturns  
Revenue deferred under guaranteed rights of return arrangements $ 17,276us-gaap_DeferredRevenueCurrent $ 21,222us-gaap_DeferredRevenueCurrent
Inventory reserve 59,200us-gaap_InventoryValuationReserves 50,100us-gaap_InventoryValuationReserves
Accounts payable and accrued expenses for key suppliers 509,318us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent 710,210us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent
Uninsured portion of cash balance 8,803,091us-gaap_CashUninsuredAmount 10,198,921us-gaap_CashUninsuredAmount
Supplier Concentration Risk [Member]    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]    
Number of key suppliers 4ogen_NumberOfKeySuppliers
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_SupplierConcentrationRiskMember
 
Accounts payable and accrued expenses for key suppliers 0us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_SupplierConcentrationRiskMember
189,120us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_SupplierConcentrationRiskMember
Guaranteed Rights of Return [Member]    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]    
Revenue deferred under guaranteed rights of return arrangements $ 17,276us-gaap_DeferredRevenueCurrent
/ us-gaap_DeferredRevenueArrangementTypeAxis
= ogen_GuaranteedRightsOfReturnMember
$ 21,222us-gaap_DeferredRevenueCurrent
/ us-gaap_DeferredRevenueArrangementTypeAxis
= ogen_GuaranteedRightsOfReturnMember