2.4.0.6 Html 66 203 1 false 30 0 false 4 false false R1.htm 101 - Document - Document and Entity Information Sheet http://www.opexatherapeutics.com/taxonomy/role/DocumentDocumentandEntityInformation Document and Entity Information true false R2.htm 103 - Statement - CONSOLIDATED BALANCE SHEETS Sheet http://www.opexatherapeutics.com/taxonomy/role/StatementOfFinancialPositionClassified CONSOLIDATED BALANCE SHEETS false false R3.htm 104 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) Sheet http://www.opexatherapeutics.com/taxonomy/role/StatementOfFinancialPositionClassifiedParenthetical CONSOLIDATED BALANCE SHEETS (Parenthetical) false false R4.htm 105 - Statement - CONSOLIDATED STATEMENTS OF EXPENSES Sheet http://www.opexatherapeutics.com/taxonomy/role/StatementOfIncomeAlternative CONSOLIDATED STATEMENTS OF EXPENSES false false R5.htm 106 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://www.opexatherapeutics.com/taxonomy/role/StatementOfCashFlowsIndirect CONSOLIDATED STATEMENTS OF CASH FLOWS false false R6.htm 107 - Disclosure - Basis of Presentation and Principles of Consolidation Sheet http://www.opexatherapeutics.com/taxonomy/role/NotesToFinancialStatementsOrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock Basis of Presentation and Principles of Consolidation false false R7.htm 108 - Disclosure - Cash and Cash Equivalents Sheet http://www.opexatherapeutics.com/taxonomy/role/NotesToFinancialStatementsCashAndCashEquivalentsDisclosureTextBlock Cash and Cash Equivalents false false R8.htm 109 - Disclosure - Other Current Assets Sheet http://www.opexatherapeutics.com/taxonomy/role/NotesToFinancialStatementsOtherAssetsDisclosureTextBlock Other Current Assets false false R9.htm 110 - Disclosure - Restricted Cash Sheet http://www.opexatherapeutics.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfRestrictedCashAndCashEquivalentsTextBlock Restricted Cash false false R10.htm 111 - Disclosure - Deferred Financing Costs Sheet http://www.opexatherapeutics.com/taxonomy/role/NotesToFinancialStatementsDeferredChargesDisclosureTextBlock Deferred Financing Costs false false R11.htm 112 - Disclosure - Convertible Secured Promissory Notes Notes http://www.opexatherapeutics.com/taxonomy/role/NotesToFinancialStatementsLongTermDebtTextBlock Convertible Secured Promissory Notes false false R12.htm 113 - Disclosure - Related Party Transactions Sheet http://www.opexatherapeutics.com/taxonomy/role/NotesToFinancialStatementsRelatedPartyTransactionsDisclosureTextBlock Related Party Transactions false false R13.htm 114 - Disclosure - Fair Value of Financial Instruments Sheet http://www.opexatherapeutics.com/taxonomy/role/NotesToFinancialStatementsFairValueDisclosuresTextBlock Fair Value of Financial Instruments false false R14.htm 115 - Disclosure - Stock Options and Warrants Sheet http://www.opexatherapeutics.com/taxonomy/role/NotesToFinancialStatementsStockOptionAndWarrantsTextBlock Stock Options and Warrants false false R15.htm 116 - Disclosure - Subsequent Events Sheet http://www.opexatherapeutics.com/taxonomy/role/NotesToFinancialStatementsSubsequentEventsTextBlock Subsequent Events false false R16.htm 117 - Disclosure - Fair Value of Financial Instruments (Tables) Sheet http://www.opexatherapeutics.com/taxonomy/role/NotesToFinancialStatementsFairValueDisclosuresTextBlockTables Fair Value of Financial Instruments (Tables) false false R17.htm 118 - Disclosure - Stock Options and Warrants (Tables) Sheet http://www.opexatherapeutics.com/taxonomy/role/NotesToFinancialStatementsStockOptionAndWarrantsTextBlockTables Stock Options and Warrants (Tables) false false R18.htm 119 - Disclosure - Basis of Presentation and Principles of Consolidation - Additional Information (Detail) Sheet http://www.opexatherapeutics.com/taxonomy/role/DisclosureBasisOfPresentationAndPrinciplesOfConsolidationAdditionalInformation Basis of Presentation and Principles of Consolidation - Additional Information (Detail) false false R19.htm 120 - Disclosure - Cash and Cash Equivalents - Additional Information (Detail) Sheet http://www.opexatherapeutics.com/taxonomy/role/DisclosureCashAndCashEquivalentsAdditionalInformation Cash and Cash Equivalents - Additional Information (Detail) false false R20.htm 121 - Disclosure - Other Current Assets - Additional Information (Detail) Sheet http://www.opexatherapeutics.com/taxonomy/role/DisclosureOtherCurrentAssetsAdditionalInformation Other Current Assets - Additional Information (Detail) false false R21.htm 122 - Disclosure - Restricted Cash - Additional Information (Detail) Sheet http://www.opexatherapeutics.com/taxonomy/role/DisclosureRestrictedCashAdditionalInformation Restricted Cash - Additional Information (Detail) false false R22.htm 123 - Disclosure - Deferred Financing Cost - Additional Information (Detail) Sheet http://www.opexatherapeutics.com/taxonomy/role/DisclosureDeferredFinancingCostAdditionalInformation Deferred Financing Cost - Additional Information (Detail) false false R23.htm 124 - Disclosure - Convertible Secured Promissory Notes - Additional Information (Detail) Notes http://www.opexatherapeutics.com/taxonomy/role/DisclosureConvertibleSecuredPromissoryNotesAdditionalInformation Convertible Secured Promissory Notes - Additional Information (Detail) false false R24.htm 125 - Disclosure - Related Party Transactions - Additional Information (Detail) Sheet http://www.opexatherapeutics.com/taxonomy/role/DisclosureRelatedPartyTransactionsAdditionalInformation Related Party Transactions - Additional Information (Detail) false false R25.htm 126 - Disclosure - Derivative Financial Liabilities Measured and Recorded at Fair Value on Consolidated Balance Sheets on Recurring Basis (Detail) Sheet http://www.opexatherapeutics.com/taxonomy/role/DisclosureDerivativeFinancialLiabilitiesMeasuredAndRecordedAtFairValueOnConsolidatedBalanceSheetsOnRecurringBasis Derivative Financial Liabilities Measured and Recorded at Fair Value on Consolidated Balance Sheets on Recurring Basis (Detail) false false R26.htm 127 - Disclosure - Changes in Fair Value of Derivative Financial Instruments Measured at Fair Value on Recurring Basis using Significant Unobservable Inputs (Detail) Sheet http://www.opexatherapeutics.com/taxonomy/role/DisclosureChangesInFairValueOfDerivativeFinancialInstrumentsMeasuredAtFairValueOnRecurringBasisUsingSignificantUnobservableInputs Changes in Fair Value of Derivative Financial Instruments Measured at Fair Value on Recurring Basis using Significant Unobservable Inputs (Detail) false false R27.htm 128 - Disclosure - Variables used in Lattice Option Pricing Model for Derivative Liabilities (Detail) Sheet http://www.opexatherapeutics.com/taxonomy/role/DisclosureVariablesUsedInLatticeOptionPricingModelForDerivativeLiabilities Variables used in Lattice Option Pricing Model for Derivative Liabilities (Detail) false false R28.htm 129 - Disclosure - Stock Options and Warrants - Additional Information (Detail) Sheet http://www.opexatherapeutics.com/taxonomy/role/DisclosureStockOptionsAndWarrantsAdditionalInformation Stock Options and Warrants - Additional Information (Detail) false false R29.htm 130 - Disclosure - Stock Option Activity (Detail) Sheet http://www.opexatherapeutics.com/taxonomy/role/DisclosureStockOptionActivity Stock Option Activity (Detail) false false R30.htm 131 - Disclosure - Warrant Activity (Detail) Sheet http://www.opexatherapeutics.com/taxonomy/role/DisclosureWarrantActivity Warrant Activity (Detail) false false R31.htm 132 - Disclosure - Subsequent Events - Additional Information (Detail) Sheet http://www.opexatherapeutics.com/taxonomy/role/DisclosureSubsequentEventsAdditionalInformation Subsequent Events - Additional Information (Detail) false false All Reports Book All Reports Process Flow-Through: 103 - Statement - CONSOLIDATED BALANCE SHEETS Process Flow-Through: Removing column 'Sep. 30, 2011' Process Flow-Through: Removing column 'Dec. 31, 2010' Process Flow-Through: 104 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) Process Flow-Through: 105 - Statement - CONSOLIDATED STATEMENTS OF EXPENSES Process Flow-Through: 106 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS opxa-20120930.xml opxa-20120930.xsd opxa-20120930_cal.xml opxa-20120930_def.xml opxa-20120930_lab.xml opxa-20120930_pre.xml true true