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Mortgage and Loans Payable - Additional Information (Detail) (USD $) | 0 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended | 1 Months Ended |  |  |  |  |  |  |  |
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Apr. 30, 2014 | Jul. 31, 2013 | Dec. 31, 2014 Coins | Dec. 31, 2013 | Dec. 31, 2012 | May 07, 2014 | Nov. 30, 2011 Investor | Jul. 11, 2011 | May 31, 2008 | May 10, 2012 | Aug. 14, 2014 | May 31, 2014 | Oct. 01, 2014 | Oct. 01, 2015 | Dec. 01, 2014 | Jan. 02, 2013 | Jul. 11, 2008
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 0.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured collateral |  |  | 24,700 omex_SecuredCollateral |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of secured collateral, percent |  |  | 40.00%omex_BorrowingBaseValueOfSecuredCollateralPercentage |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate amount issuable |  |  |  |  |  |  |  |  |  | $ 8,000,000 us-gaap_DebtInstrumentFaceAmount |  |  |  |  |  |  |
Shares issued to lender |  |  |  | 24,000,000 us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, number of shares | 5,225 us-gaap_DebtConversionConvertedInstrumentSharesIssued1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, Value of shares |  |  | 2,347,826 us-gaap_DebtConversionConvertedInstrumentAmount1 | 8,608,694 us-gaap_DebtConversionConvertedInstrumentAmount1 | 4,262,528 us-gaap_DebtConversionConvertedInstrumentAmount1 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate description |  |  | Prime rate plus three-fourths of one percent (0.75%) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company's consolidated debt |  |  | 15,660,299 us-gaap_LongTermDebt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Periodic payments, principal |  |  | 10,750 us-gaap_DebtInstrumentPeriodicPaymentPrincipal |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued to purchase common stock |  |  | 1,302,083 omex_MaximumIssueOfWarrantsToPurchaseCommonStock |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument conversion price, percentage |  |  | 125.00%omex_PercentageOfDebtInstrumentConversionPriceOnMarketPriceOfCommonStock |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock initial exercise price |  |  | $ 4.32 us-gaap_AcceleratedShareRepurchasesInitialPricePaidPerShare |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issued under warrant terms |  |  | 434,027 omex_SharesOfCommonStockIssuableUponExerciseOfWarrant |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period to exercise warrants |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant exercise price |  |  |  |  |  |  |  |  |  | $ 3.60 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 |  |  |  |  |  |  |
Registration statement filing period |  |  | 6 months |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period for registration statement to be effective |  |  | 90 days thereafter |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registration statement review period |  |  | 120 days thereafter |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of warrant |  |  | 5 years 6 months |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds from derivative instrument |  |  | 10,000,000 us-gaap_ProceedsFromDerivativeInstrumentFinancingActivities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment costs paid from proceeds |  |  | 45,000 us-gaap_PaymentsForDerivativeInstrumentFinancingActivities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Direct financing cost |  |  | 500,000 us-gaap_PaymentsOfFinancingCosts |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred cost |  |  | 246,653 us-gaap_PaymentsOfDebtIssuanceCosts |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recorded expenses |  |  | 253,347 us-gaap_PaymentsOfLoanCosts |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  | 279,070 us-gaap_InterestExpenseDebt | 2,146,182 us-gaap_InterestExpenseDebt |  |  |  |  |  |  |  |  |  |  |  |  |
Oceanica Resources S. de. R.L [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Per share value of shares purchased by private investor |  |  | $ 2.50 us-gaap_SaleOfStockPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = omex_OceanicaResourcesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Scenario, Previously Reported [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant exercise price |  |  | $ 4.32 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restatement Adjustment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted warrants exercise price |  |  | 3.60 omex_ClassOfWarrantOrRightAdjustedExercisePriceOfWarrantsOrRights / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  | 5.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |  |  |  |  |  |  |
Maturity date |  |  | May 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility agreement |  |  |  |  |  | 10,000,000 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |  |  |  |  |  |  |
Interest rate description |  |  | One month LIBOR rate plus 500 basis points |  |  |  |  |  |  |  |  |  |  |  |  |  |
Origination fee payable |  |  |  |  |  | 50,000 us-gaap_LineOfCreditFacilityCommitmentFeeAmount / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |  |  |  |  |  |  |
Restricted cash deposit |  |  |  |  |  | 500,000 us-gaap_RestrictedCashAndInvestments / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |  |  |  |  |  |  |
Outstanding loan balance |  |  | 7,684,514 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
First Mortgage [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company's consolidated debt |  |  | 543,209 us-gaap_LongTermDebt / us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis = us-gaap_FirstMortgageMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 5.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument description |  |  | One month LIBOR rate plus 500 basis points |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity date |  |  | Jul. 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Periodic payment |  | 500,000 us-gaap_DebtInstrumentPeriodicPayment / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance of term loan |  |  | 4,000,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Project Term Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  | 5.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument description |  |  | One-month LIBOR rate plus 500 basis points |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity date |  |  | Jul. 24, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance of term loan |  |  | 10,000,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate amount issuable |  |  | 10,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |  |  | 10,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember | 10,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |
Number of wholly owned subsidiaries |  |  | 2 omex_NumberOfWhollyOwnedSubsidiaries / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, number of shares |  |  | 100,000 us-gaap_DebtConversionConvertedInstrumentSharesIssued1 / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, Value of shares |  |  | 250,000 us-gaap_DebtConversionConvertedInstrumentAmount1 / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of components included in interest expense |  |  | 316,920 omex_AmortizationOfFinancingCostsIncludedInInterestExpense / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Marketing program compensation expenses, percentage yet to be recognized |  |  | 5.00%omex_MarketingFeePercentage / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted cash deposit |  |  | 500,000 us-gaap_RestrictedCashAndInvestments / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company's consolidated debt |  | 10,000,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan origination fee paid at closing |  |  | 50,000 us-gaap_LoanProcessingFee / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss recovered |  | 1,800,000 omex_WeightOfSilverBullionRecovered / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Project Term Loans [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial principal amount of note, percent |  |  | 50.00%omex_DebtInstrumentPercentageOfPrincipalAmountIssuedToInitialLenders / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Project Term Loans [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial principal amount of note, percent |  |  | 100.00%omex_DebtInstrumentPercentageOfPrincipalAmountIssuedToInitialLenders / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Project Term Loans [Member] | Oceanica Resources S. de. R.L [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued to lender |  |  | 100,000 us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = omex_OceanicaResourcesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Per share value of shares purchased by private investor |  |  | $ 3.15 us-gaap_SaleOfStockPricePerShare / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = omex_OceanicaResourcesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate value of shares issued to lender |  |  | 1,000,000 us-gaap_SaleOfStockConsiderationReceivedPerTransaction / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = omex_OceanicaResourcesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Project Term Loans [Member] | Gairsoppa [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Project term loan collateral value |  | 10,000,000 us-gaap_DebtInstrumentCollateralAmount / us-gaap_CounterpartyNameAxis = omex_GairsoppaMember / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Project Term Loans [Member] | First Tranche [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan amount borrowed |  |  |  |  |  |  |  |  |  |  | 5,000,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |
Project Term Loans [Member] | Second Tranche [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unused borrowing capacity |  |  |  |  |  |  |  |  |  |  | 2,500,000 us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |
Aggregate amount issuable |  |  |  |  |  |  |  |  |  |  |  |  | 2,500,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  |  |  |  |  |  | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |
Project Term Loans [Member] | Second Tranche [Member] | Scenario, Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 11.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember |  |  |
Project Term Loans [Member] | Third Tranche Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unused borrowing capacity |  |  |  |  |  |  |  |  |  |  | 2,500,000 us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |  |  |  |  |
Aggregate amount issuable |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,500,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_LongtermDebtTypeAxis = omex_ProjectTermLoanMember |  |
Senior Convertible Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate amount issuable |  |  |  |  |  |  | 10,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNotesMember |  |  |  |  |  |  |  |  |  |
Warrants issued to purchase common stock |  |  |  |  |  |  | 1,302,083 omex_MaximumIssueOfWarrantsToPurchaseCommonStock / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNotesMember |  |  |  |  |  |  |  |  |  |
Original principal amount of repurchased note |  |  |  |  |  |  | 5,000,000 us-gaap_DebtInstrumentRepurchasedFaceAmount / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNotesMember |  |  |  |  |  |  |  |  |  |
Debt related expenses |  |  | 545,000 us-gaap_DebtIssuanceCosts / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of institutional investors under securities purchase agreement |  |  |  |  |  |  | 1 omex_NumberOfInstitutionalInvestorUnderSecuritiesPurchaseAgreement / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNotesMember |  |  |  |  |  |  |  |  |  |
Indebtedness, interest rate per year |  |  | 8.00%omex_IndebtednessInterestRatePerYear / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Indebtedness, interest rate per year under default condition |  |  | 15.00%omex_IndebtednessInterestRatePerYearUnderDefaultCondition / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original principal installments |  |  | 434,783 omex_DebtInstrumentOriginalPrincipalPayment / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note repayment commencing date |  |  | Jul. 08, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument conversion price, percentage |  |  | 110.00%omex_PercentageOfDebtInstrumentConversionPriceOnMarketPriceOfCommonStock / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial conversion price |  |  |  |  |  |  |  |  |  | $ 3.17 us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNotesMember |  |  |  |  |  |  |
Debt instrument amortization payment description |  |  | The conversion rate applicable to any amortization payment that were made in shares of our common stock was the lower of (a) the Conversion Price and (b) a price equal to 85.0% of the average for a ten-day period immediately prior to the applicable amortization date of the volume-weighted average price of our shares of common stock. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Convertible Notes [Member] | Lender [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt related expenses |  |  | 45,000 us-gaap_DebtIssuanceCosts / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNotesMember / us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis = omex_LenderMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan amount borrowed |  |  | 2,347,826 us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate amount issuable |  |  |  |  |  |  |  |  |  | 8,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  |  |  | 9.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |  |  |  |  |  |  |
Initial conversion price |  |  |  |  |  |  |  |  |  | $ 3.74 us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |  |  |  |  |  | $ 3.17 us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |
Debt instrument amortization payment description |  |  | The conversion rate applicable to any amortization payment made in shares of our common stock was the lower of (a) the Conversion Price and (b) a price equal to 85.0% of the average for a ten-day period immediately prior to the applicable amortization date of the volume-weighted average price of our shares of common stock. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volume-weighted average price, percentage |  |  | 85.00%omex_PercentageOfConversionPriceEqualToVolumeWeightedAveragePrice / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price applicable period |  |  | 10 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issued under warrant terms |  |  | 1,562,500 omex_SharesOfCommonStockIssuableUponExerciseOfWarrant / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum percentage of cash flow effect on present value basis |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00%omex_MaximumPercentageOfCashFlowEffectOnPresentValueBasis / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |
Percentage of carrying value of additional note to determine change in fair value of embedded conversion option |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00%omex_PercentageOfCarryingValueOfAdditionalNoteToDetermineChangeInFairValueOfEmbeddedConversionOption / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |
Principal amount of loan, paid in cash |  |  | 1,739,130 us-gaap_RepaymentsOfNotesPayable / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds from derivative instrument |  |  | 8,000,000 us-gaap_ProceedsFromDerivativeInstrumentFinancingActivities / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment costs paid from proceeds |  |  | 5,518 us-gaap_PaymentsForDerivativeInstrumentFinancingActivities / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Direct financing cost |  |  | 400,000 us-gaap_PaymentsOfFinancingCosts / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred cost |  |  | 317,201 us-gaap_PaymentsOfDebtIssuanceCosts / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recorded expenses |  |  | 82,799 us-gaap_PaymentsOfLoanCosts / us-gaap_LongtermDebtTypeAxis = omex_AdditionalNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgages Payable [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  |  | 0.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember |  |  |  |  |  |  |  |  |
Maturity date |  |  | Jul. 11, 2013 |  |  |  |  |  | May 14, 2015 |  |  |  |  |  |  |  |
Periodic payment |  |  |  |  |  |  |  |  | 5,080 us-gaap_DebtInstrumentPeriodicPayment / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  |  | 6.45%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember |  |  |  |  |  |  |  |
Interest rate description |  |  | Prime rate plus three-fourths of one percent (0.75%) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company's consolidated debt |  |  | 1,119,250 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,580,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember
Periodic payments, principal |  |  | 10,750 us-gaap_DebtInstrumentPeriodicPaymentPrincipal / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
New maturity date of mortgage loan |  |  | Jul. 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgages Payable [Member] | First Mortgage [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan amount borrowed |  |  |  |  |  |  |  |  | 679,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis = us-gaap_FirstMortgageMember |  |  |  |  |  |  |  |
Senior Convertible Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument conversion, reset conversion price description |  |  | The reset conversion price applicable to the Initial Note was to be adjusted to the lesser of (a) the then current conversion price and (b) the greater of (i) $1.44 and (ii) 110.0% of the market price of our common stock on the six-month anniversary of the initial closing date (as applicable, the "Conversion Price"). |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument conversion price |  |  | $ 1.44 us-gaap_DebtInstrumentConvertibleStockPriceTrigger / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNoteMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument conversion price, percentage |  |  | 110.00%omex_PercentageOfDebtInstrumentConversionPriceOnMarketPriceOfCommonStock / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNoteMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial conversion price |  |  | $ 3.74 us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNoteMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volume-weighted average price, percentage |  |  | 85.00%omex_PercentageOfConversionPriceEqualToVolumeWeightedAveragePrice / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNoteMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price applicable period |  |  | 10 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common shares issued as payment in outstanding principal |  |  |  | 3,282,934 omex_CommonStockSharesIssuedAsPaymentRelatedToOutstandingPrincipalAmount / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNoteMember |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount outstanding |  |  |  | 8,608,694 omex_DebtInstrumentPrincipalAmountRedeemed / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNoteMember |  |  |  |  |  |  |  |  |  |  |  |  |
Principal payment |  |  | $ 1,391,306 omex_DebtInstrumentPrincipalPayments / us-gaap_LongtermDebtTypeAxis = omex_SeniorConvertibleNoteMember |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Borrowing base value of secured collateral percentage. + References No definition available. + Details
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- Definition Class of warrant or right adjusted exercise price of warrants or rights. + References No definition available. + Details
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- Definition Common stock shares issued as payment related to outstanding principal amount. + References No definition available. + Details
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- Definition Debt instrument conversion reset conversion price description. + References No definition available. + Details
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- Definition Debt instrument original principal payment. + References No definition available. + Details
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- Definition Debt instrument percentage of principal amount issued to initial lenders. + References No definition available. + Details
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- Definition Debt instrument principal amount redeemed. + References No definition available. + Details
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- Definition Debt instrument principal payments. + References No definition available. + Details
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- Definition Debt instrument revised maturity date. + References No definition available. + Details
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- Definition Indebtedness interest rate per year. + References No definition available. + Details
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- Definition Indebtedness interest rate per year under default condition. + References No definition available. + Details
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- Definition Marketing Fee Percentage + References No definition available. + Details
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- Definition Maximum issue of warrants to purchase common stock. + References No definition available. + Details
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- Definition Maximum percentage of cash flow effect on present value basis. + References No definition available. + Details
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- Definition Number of institutional investor under securities purchase agreement. + References No definition available. + Details
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- Definition Percentage of carrying value of additional note to determine change in fair value of embedded conversion option. + References No definition available. + Details
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- Definition Percentage of conversion price equal to volume weighted average price. + References No definition available. + Details
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- Definition Percentage of debt instrument conversion price on market price of common stock. + References No definition available. + Details
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- Definition Period for registration statement of initial closing date. + References No definition available. + Details
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- Definition Period for registration statement subject to review. + References No definition available. + Details
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- Definition Period for registration statement to be declared effective. + References No definition available. + Details
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- Definition Period for warrant term. + References No definition available. + Details
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- Definition Secured collateral. + References No definition available. + Details
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- Definition Shares of common stock issuable upon exercise of warrant. + References No definition available. + Details
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- Definition Weight of silver bullion recovered. + References No definition available. + Details
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- Definition The price paid per share to immediately purchase the targeted number of shares on the date of executing the accelerated share repurchase agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653 + Details
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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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- Definition Amount of assets pledged to secure a debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Definition The price per share of the conversion feature embedded in the debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870 + Details
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- Definition Price of the entity's common stock which would be required to be attained for the conversion feature embedded in the debt instrument to become effective. + References No definition available. + Details
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- Definition Description of the conversion terms of a debt instrument which may include the conversion ratio (including all potential conversion ratios if contingently adjustable), type of debt or equity security into which the debt is convertible, the dollars of debt or the number of shares into which the instrument is convertible (or potentially convertible into), the conversion period, any contingencies associated with the conversion terms, and the existence and amount of a beneficial conversion feature. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(5)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of the required periodic payments including both interest and principal payments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Definition Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Subparagraph b -Article 5 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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