2.4.0.8 Html 272 353 1 false 99 0 false 8 false false R1.htm 001 - Document - Document and Entity Information Sheet http://www.marinabiotech.com/role/DocumentAndEntityInformation Document and Entity Information true false R2.htm 002 - Statement - CONSOLIDATED BALANCE SHEETS Sheet http://www.marinabiotech.com/role/ConsolidatedBalanceSheets CONSOLIDATED BALANCE SHEETS false false R3.htm 003 - Statement - CONSOLIDATED BALANCE SHEETS (Parentheticals) Sheet http://www.marinabiotech.com/role/Consolidatedbalancesheetsparentheticals CONSOLIDATED BALANCE SHEETS (Parentheticals) false false R4.htm 004 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS Sheet http://www.marinabiotech.com/role/ConsolidatedStatementsOfOperations CONSOLIDATED STATEMENTS OF OPERATIONS false false R5.htm 005 - Statement - CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (DEFICIT) Sheet http://www.marinabiotech.com/role/ConsolidatedStatementOfStockholdersEquityDeficit CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (DEFICIT) false false R6.htm 006 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://www.marinabiotech.com/role/ConsolidatedStatementsOfCashFlows CONSOLIDATED STATEMENTS OF CASH FLOWS false false R7.htm 007 - Disclosure - Business, Liquidity and Summary of Significant Accounting Policies Sheet http://www.marinabiotech.com/role/BusinessLiquidityAndSummaryOfSignificantAccountingPolicies Business, Liquidity and Summary of Significant Accounting Policies false false R8.htm 008 - Disclosure - Intangible assets Sheet http://www.marinabiotech.com/role/IntangibleAssets Intangible assets false false R9.htm 009 - Disclosure - Property and Equipment Sheet http://www.marinabiotech.com/role/PropertyAndEquipment Property and Equipment false false R10.htm 010 - Disclosure - Restructuring Charges Sheet http://www.marinabiotech.com/role/RestructuringCharges Restructuring Charges false false R11.htm 011 - Disclosure - Notes Payable Notes http://www.marinabiotech.com/role/NotesPayable Notes Payable false false R12.htm 012 - Disclosure - Stockholders' Equity Sheet http://www.marinabiotech.com/role/StockholdersEquity Stockholders' Equity false false R13.htm 013 - Disclosure - Stock Incentive Plans Sheet http://www.marinabiotech.com/role/StockIncentivePlans Stock Incentive Plans false false R14.htm 014 - Disclosure - Employee Benefit Plan Sheet http://www.marinabiotech.com/role/EmployeeBenefitPlan Employee Benefit Plan false false R15.htm 015 - Disclosure - Income Taxes Sheet http://www.marinabiotech.com/role/IncomeTaxes Income Taxes false false R16.htm 016 - Disclosure - Intellectual Property and Collaborative Agreements Sheet http://www.marinabiotech.com/role/IntellectualPropertyAndCollaborativeAgreements Intellectual Property and Collaborative Agreements false false R17.htm 017 - Disclosure - Commitments and Contingencies Sheet http://www.marinabiotech.com/role/CommitmentsAndContingencies Commitments and Contingencies false false R18.htm 018 - Disclosure - Subsequent Events Sheet http://www.marinabiotech.com/role/SubsequentEvents Subsequent Events false false R19.htm 019 - Disclosure - Business, Liquidity and Summary of Significant Accounting Policies (Policy) Sheet http://www.marinabiotech.com/role/BusinessLiquidityAndSummaryOfSignificantAccountingPoliciesPolicy Business, Liquidity and Summary of Significant Accounting Policies (Policy) false false R20.htm 020 - Disclosure - Business, Liquidity and Summary of Significant Accounting Policies (Tables) Sheet http://www.marinabiotech.com/role/BusinessLiquidityAndSummaryOfSignificantAccountingPoliciesTables Business, Liquidity and Summary of Significant Accounting Policies (Tables) false false R21.htm 021 - Disclosure - Restructuring Charges (Tables) Sheet http://www.marinabiotech.com/role/RestructuringChargesTables Restructuring Charges (Tables) false false R22.htm 022 - Disclosure - Stockholders' Equity (Tables) Sheet http://www.marinabiotech.com/role/StockholdersEquityTables Stockholders' Equity (Tables) false false R23.htm 023 - Disclosure - Stock Incentive Plans (Tables) Sheet http://www.marinabiotech.com/role/StockIncentivePlansTables Stock Incentive Plans (Tables) false false R24.htm 024 - Disclosure - Income Taxes (Tables) Sheet http://www.marinabiotech.com/role/IncomeTaxesTables Income Taxes (Tables) false false R25.htm 025 - Disclosure - Business, Liquidity and Summary of Significant Accounting Policies (Details) Sheet http://www.marinabiotech.com/role/BusinessLiquidityAndSummaryOfSignificantAccountingPoliciesDetails Business, Liquidity and Summary of Significant Accounting Policies (Details) false false R26.htm 026 - Disclosure - Business, Liquidity and Summary of Significant Accounting Policies (Details 1) Sheet http://www.marinabiotech.com/role/BusinessLiquidityAndSummaryOfSignificantAccountingPoliciesDetails1 Business, Liquidity and Summary of Significant Accounting Policies (Details 1) false false R27.htm 027 - Disclosure - Business, Liquidity and Summary of Significant Accounting Policies (Details 2) Sheet http://www.marinabiotech.com/role/BusinessLiquidityAndSummaryOfSignificantAccountingPoliciesDetails2 Business, Liquidity and Summary of Significant Accounting Policies (Details 2) false false R28.htm 028 - Disclosure - Business, Liquidity and Summary of Significant Accounting Policies (Details 3) Sheet http://www.marinabiotech.com/role/BusinessLiquidityAndSummaryOfSignificantAccountingPoliciesDetails3 Business, Liquidity and Summary of Significant Accounting Policies (Details 3) false false R29.htm 029 - Disclosure - Business, Liquidity and Summary of Significant Accounting Policies (Details 4) Sheet http://www.marinabiotech.com/role/BusinessLiquidityAndSummaryOfSignificantAccountingPoliciesDetails4 Business, Liquidity and Summary of Significant Accounting Policies (Details 4) false false R30.htm 030 - Disclosure - Business, Liquidity and Summary of Significant Accounting Policies (Details 5) Sheet http://www.marinabiotech.com/role/BusinessLiquidityAndSummaryOfSignificantAccountingPoliciesDetails5 Business, Liquidity and Summary of Significant Accounting Policies (Details 5) false false R31.htm 031 - Disclosure - Business, Liquidity and Summary of Significant Accounting Policies (Details 6) Sheet http://www.marinabiotech.com/role/BusinessLiquidityAndSummaryOfSignificantAccountingPoliciesDetails6 Business, Liquidity and Summary of Significant Accounting Policies (Details 6) false false R32.htm 032 - Disclosure - Business, Liquidity and Summary of Significant Accounting Policies (Detail Textuals) Sheet http://www.marinabiotech.com/role/BusinessLiquidityAndSummaryOfSignificantAccountingPoliciesDetailTextuals Business, Liquidity and Summary of Significant Accounting Policies (Detail Textuals) false false R33.htm 033 - Disclosure - Intangible assets (Detail Textuals) Sheet http://www.marinabiotech.com/role/IntangibleAssetsDetailTextuals Intangible assets (Detail Textuals) false false R34.htm 034 - Disclosure - Intangible assets (Detail Textuals 1) Sheet http://www.marinabiotech.com/role/IntangibleAssetsDetailTextuals1 Intangible assets (Detail Textuals 1) false false R35.htm 035 - Disclosure - Property and Equipment (Detail Textuals) Sheet http://www.marinabiotech.com/role/PropertyAndEquipmentDetailTextuals Property and Equipment (Detail Textuals) false false R36.htm 036 - Disclosure - Restructuring Charges (Details) Sheet http://www.marinabiotech.com/role/RestructuringChargesDetails Restructuring Charges (Details) false false R37.htm 037 - Disclosure - Restructuring Charges (Detail Textuals) Sheet http://www.marinabiotech.com/role/RestructuringChargesDetailTextuals Restructuring Charges (Detail Textuals) false false R38.htm 038 - Disclosure - Notes Payable (Detail Textuals) Notes http://www.marinabiotech.com/role/NotesPayableDetailTextuals Notes Payable (Detail Textuals) false false R39.htm 039 - Disclosure - Notes Payable (Detail Textuals 1) Notes http://www.marinabiotech.com/role/NotesPayableDetailTextuals1 Notes Payable (Detail Textuals 1) false false R40.htm 040 - Disclosure - Stockholders' Equity (Details) Sheet http://www.marinabiotech.com/role/StockholdersEquityDetails Stockholders' Equity (Details) false false R41.htm 041 - Disclosure - Stockholders' Equity (Preferred Stock) (Detail Textuals) Sheet http://www.marinabiotech.com/role/StockholdersEquityPreferredStockDetails Stockholders' Equity (Preferred Stock) (Detail Textuals) false false R42.htm 042 - Disclosure - Stockholders' Equity (Common Stock) (Detail Textuals 1) Sheet http://www.marinabiotech.com/role/Stockholdersequitycommonstockdetails Stockholders' Equity (Common Stock) (Detail Textuals 1) false false R43.htm 043 - Disclosure - Stockholders' Equity (Warrants) (Detail Textuals 2) Sheet http://www.marinabiotech.com/role/StockholdersEquityWarrantsDetails Stockholders' Equity (Warrants) (Detail Textuals 2) false false R44.htm 044 - Disclosure - Stockholders' Equity (Subscription Investment Units) (Detail Textuals 3) Sheet http://www.marinabiotech.com/role/StockholdersEquitySubscriptionInvestmentUnitsDetails Stockholders' Equity (Subscription Investment Units) (Detail Textuals 3) false false R45.htm 045 - Disclosure - Stock Incentive Plans (Stock-Based Compensation Expense) (Details) Sheet http://www.marinabiotech.com/role/StockIncentivePlansStockBasedCompensationExpenseDetails Stock Incentive Plans (Stock-Based Compensation Expense) (Details) false false R46.htm 046 - Disclosure - Stock Incentive Plans (Stock Option Activity) (Details 1) Sheet http://www.marinabiotech.com/role/StockIncentivePlansStockOptionActivityDetails1 Stock Incentive Plans (Stock Option Activity) (Details 1) false false R47.htm 047 - Disclosure - Stock Incentive Plans (Stock options outstanding) (Details 2) Sheet http://www.marinabiotech.com/role/StockIncentivePlansStockOptionsOutstandingDetails2 Stock Incentive Plans (Stock options outstanding) (Details 2) false false R48.htm 048 - Disclosure - Stock Incentive Plans (Detail Textuals) Sheet http://www.marinabiotech.com/role/StockIncentivePlansDetailTextuals Stock Incentive Plans (Detail Textuals) false false R49.htm 049 - Disclosure - Stock Incentive Plans (Detail Textuals 1) Sheet http://www.marinabiotech.com/role/StockIncentivePlansDetailTextuals1 Stock Incentive Plans (Detail Textuals 1) false false R50.htm 050 - Disclosure - Employee Benefit Plan (Detail Textuals) Sheet http://www.marinabiotech.com/role/EmployeeBenefitPlanDetailTextuals Employee Benefit Plan (Detail Textuals) false false R51.htm 051 - Disclosure - Income Taxes (Details) Sheet http://www.marinabiotech.com/role/IncomeTaxesDetails Income Taxes (Details) false false R52.htm 052 - Disclosure - Income Taxes (Detail Textuals) Sheet http://www.marinabiotech.com/role/IncomeTaxesDetailTextuals Income Taxes (Detail Textuals) false false R53.htm 053 - Disclosure - Intellectual Property and Collaborative Agreements (Detail Textuals) Sheet http://www.marinabiotech.com/role/IntellectualPropertyAndCollaborativeAgreementsDetailTextuals Intellectual Property and Collaborative Agreements (Detail Textuals) false false R54.htm 054 - Disclosure - Intellectual Property and Collaborative Agreements (Detail Textuals 1) Sheet http://www.marinabiotech.com/role/IntellectualPropertyAndCollaborativeAgreementsDetailTextuals1 Intellectual Property and Collaborative Agreements (Detail Textuals 1) false false R55.htm 055 - Disclosure - Commitments and Contingencies (Details) Sheet http://www.marinabiotech.com/role/CommitmentsAndContingenciesDetails Commitments and Contingencies (Details) false false All Reports Book All Reports Element mrna_FairValueOfSharesToBeIssued had a mix of decimals attribute values: -5 -4. Element mrna_NonCashInterestExpense had a mix of decimals attribute values: -4 -3. Element mrna_StockIssuedDuringPeriodThroughWarrants had a mix of decimals attribute values: -5 -4. Element us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 had a mix of decimals attribute values: 2 3. Element us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights had a mix of decimals attribute values: -4 -3 0. Element us-gaap_DebtConversionConvertedInstrumentSharesIssued1 had a mix of decimals attribute values: -5 0. Element us-gaap_DebtInstrumentFaceAmount had a mix of decimals attribute values: -5 -4. Element us-gaap_DeferredTaxAssetsOperatingLossCarryforwards had a mix of decimals attribute values: -5 -3. Element us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets had a mix of decimals attribute values: -5 -3. Element us-gaap_FairValueAdjustmentOfWarrants had a mix of decimals attribute values: -4 -3. Element us-gaap_ProceedsFromIssuanceOrSaleOfEquity had a mix of decimals attribute values: -5 -3. Element us-gaap_ResearchAndDevelopmentExpense had a mix of decimals attribute values: -5 -3. Element us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant had a mix of decimals attribute values: -6 -4. Element us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 had a mix of decimals attribute values: -3 0. Element us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross had a mix of decimals attribute values: -3 0. Element us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue had a mix of decimals attribute values: -3 0. Element us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1 had a mix of decimals attribute values: -5 -4. Element us-gaap_StockIssuedDuringPeriodSharesPurchaseOfAssets had a mix of decimals attribute values: -4 0. Element us-gaap_StockIssuedDuringPeriodValuePurchaseOfAssets had a mix of decimals attribute values: -5 -3. Element us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount had a mix of decimals attribute values: -5 -4. 'Shares' elements on report '004 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS' had a mix of different decimal attribute values. 'Monetary' elements on report '032 - Disclosure - Business, Liquidity and Summary of Significant Accounting Policies (Detail Textuals)' had a mix of different decimal attribute values. 'Monetary' elements on report '034 - Disclosure - Intangible assets (Detail Textuals 1)' had a mix of different decimal attribute values. 'Monetary' elements on report '037 - Disclosure - Restructuring Charges (Detail Textuals)' had a mix of different decimal attribute values. 'Shares' elements on report '039 - Disclosure - Notes Payable (Detail Textuals 1)' had a mix of different decimal attribute values. 'Monetary' elements on report '039 - Disclosure - Notes Payable (Detail Textuals 1)' had a mix of different decimal attribute values. 'Monetary' elements on report '041 - Disclosure - Stockholders' Equity (Preferred Stock) (Detail Textuals)' had a mix of different decimal attribute values. 'Monetary' elements on report '042 - Disclosure - Stockholders' Equity (Common Stock) (Detail Textuals 1)' had a mix of different decimal attribute values. 'Shares' elements on report '043 - Disclosure - Stockholders' Equity (Warrants) (Detail Textuals 2)' had a mix of different decimal attribute values. 'Monetary' elements on report '043 - Disclosure - Stockholders' Equity (Warrants) (Detail Textuals 2)' had a mix of different decimal attribute values. 'Monetary' elements on report '048 - Disclosure - Stock Incentive Plans (Detail Textuals)' had a mix of different decimal attribute values. 'Shares' elements on report '049 - Disclosure - Stock Incentive Plans (Detail Textuals 1)' had a mix of different decimal attribute values. 'Monetary' elements on report '052 - Disclosure - Income Taxes (Detail Textuals)' had a mix of different decimal attribute values. 'Monetary' elements on report '054 - Disclosure - Intellectual Property and Collaborative Agreements (Detail Textuals 1)' had a mix of different decimal attribute values. Process Flow-Through: 002 - Statement - CONSOLIDATED BALANCE SHEETS Process Flow-Through: Removing column 'Sep. 30, 2013' Process Flow-Through: Removing column 'Dec. 31, 2011' Process Flow-Through: 003 - Statement - CONSOLIDATED BALANCE SHEETS (Parentheticals) Process Flow-Through: Removing column 'Dec. 31, 2011' Process Flow-Through: 004 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS Process Flow-Through: 006 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS mrna-20140930.xml mrna-20140930.xsd mrna-20140930_cal.xml mrna-20140930_def.xml mrna-20140930_lab.xml mrna-20140930_pre.xml true true