XML 45 R67.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Derivative Financial Instruments - Significant Assumptions Utilized in Valuation Technique (Detail) (USD $) | 12 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2013 | Aug. 14, 2014 | Dec. 31, 2014 | Oct. 01, 2014 | Dec. 01, 2014
Derivative [Line Items] |  |  |  |  |
Quoted market price/ underlying price on valuation date |  |  | $ 2.50 omex_FairValueAssumptionsQuotedPrice |  |
Monte Carlo Simulations [Member] | Senior Convertible Notes [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Quoted market price/ underlying price on valuation date | $ 2.02 omex_FairValueAssumptionsQuotedPrice / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_SeniorConvertibleNotesMember |  |  |  |
Contractual conversion rate | $ 3.17 omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualConversionRate / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_SeniorConvertibleNotesMember |  |  |  |
Range of effective contractual conversion rates | $ 0 omex_DerivativeFinancialInstrumentsFairValueAssumptionsEffectOfContractualConversionRates / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_SeniorConvertibleNotesMember |  |  |  |
Contractual term to maturity | 3 months 29 days |  |  |  |
Implied expected term to maturity | 3 months 29 days |  |  |  |
Market volatility: |  |  |  |  |
Range of equivalent credit risk adjusted yields | 0.67%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_SeniorConvertibleNotesMember |  |  |  |
Monte Carlo Simulations [Member] | Monaco Notes [Member] | First Tranche [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Quoted market price/ underlying price on valuation date |  | $ 2.50 omex_FairValueAssumptionsQuotedPrice / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | $ 2.50 omex_FairValueAssumptionsQuotedPrice / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  |
Contractual conversion rate |  | $ 3.15 omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualConversionRate / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | $ 3.15 omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualConversionRate / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  |
Contractual term to maturity |  | 2 years | 1 year 7 months 13 days |  |
Implied expected term to maturity |  | 1 year 10 months 6 days | 1 year 6 months 4 days |  |
Market volatility: |  |  |  |  |
Range of equivalent volatilities |  | 51.20%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 69.70%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  |
Range of equivalent market risk adjusted interest rates |  | 9.50%omex_DerivativeFinancialInstrumentsFairValueAssumptionsMarketRiskAdjustedRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 9.50%omex_DerivativeFinancialInstrumentsFairValueAssumptionsMarketRiskAdjustedRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  |
Range of equivalent credit risk adjusted yields |  | 4.15%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 4.86%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  |
Monte Carlo Simulations [Member] | Monaco Notes [Member] | Second Tranche [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Quoted market price/ underlying price on valuation date |  |  | $ 2.50 omex_FairValueAssumptionsQuotedPrice / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | $ 2.50 omex_FairValueAssumptionsQuotedPrice / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |
Contractual conversion rate |  |  | $ 3.15 omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualConversionRate / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | $ 3.15 omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualConversionRate / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |
Contractual term to maturity |  |  | 1 year 9 months | 2 years |
Implied expected term to maturity |  |  | 1 year 7 months 6 days | 1 year 9 months 15 days |
Market volatility: |  |  |  |  |
Range of equivalent volatilities |  |  | 70.40%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 68.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |
Range of equivalent market risk adjusted interest rates |  |  | 9.50%omex_DerivativeFinancialInstrumentsFairValueAssumptionsMarketRiskAdjustedRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 9.25%omex_DerivativeFinancialInstrumentsFairValueAssumptionsMarketRiskAdjustedRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |
Range of equivalent credit risk adjusted yields |  |  | 4.91%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 4.24%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |
Monte Carlo Simulations [Member] | Monaco Notes [Member] | Third Tranche Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Quoted market price/ underlying price on valuation date |  |  | $ 2.50 omex_FairValueAssumptionsQuotedPrice / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  | $ 2.50 omex_FairValueAssumptionsQuotedPrice / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember
Contractual conversion rate |  |  | $ 3.15 omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualConversionRate / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  | $ 3.15 omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualConversionRate / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember
Contractual term to maturity |  |  | 1 year 11 months 1 day |  | 2 years
Implied expected term to maturity |  |  | 1 year 8 months 19 days |  | 1 year 9 months 4 days
Market volatility: |  |  |  |  |
Range of equivalent volatilities |  |  | 69.50%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  | 72.20%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember
Range of equivalent market risk adjusted interest rates |  |  | 9.25%omex_DerivativeFinancialInstrumentsFairValueAssumptionsMarketRiskAdjustedRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  | 9.25%omex_DerivativeFinancialInstrumentsFairValueAssumptionsMarketRiskAdjustedRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember
Range of equivalent credit risk adjusted yields |  |  | 4.91%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  | 4.52%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember
Minimum [Member] | Monte Carlo Simulations [Member] | Senior Convertible Notes [Member] |  |  |  |  |
Market volatility: |  |  |  |  |
Range of volatilities | 47.40%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_SeniorConvertibleNotesMember |  |  |  |
Range of equivalent volatilities | 59.90%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_SeniorConvertibleNotesMember |  |  |  |
Contractual interest rate | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_SeniorConvertibleNotesMember |  |  |  |
Range of equivalent market risk adjusted interest rates | 8.08%omex_DerivativeFinancialInstrumentsFairValueAssumptionsMarketRiskAdjustedRateRangeOfRates / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_SeniorConvertibleNotesMember |  |  |  |
Risk-free rates | 0.01%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_SeniorConvertibleNotesMember |  |  |  |
Minimum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | First Tranche [Member] |  |  |  |  |
Market volatility: |  |  |  |  |
Range of volatilities |  | 37.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 58.50%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  |
Contractual interest rate |  | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  |
Range of equivalent credit risk adjusted yields |  | 3.94%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 4.66%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  |
Minimum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Second Tranche [Member] |  |  |  |  |
Market volatility: |  |  |  |  |
Range of volatilities |  |  | 60.10%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 58.60%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |
Contractual interest rate |  |  | 8.00%omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualInterestRate / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 8.00%omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualInterestRate / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |
Range of equivalent credit risk adjusted yields |  |  | 4.66%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 3.97%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |
Minimum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Third Tranche Member] |  |  |  |  |
Market volatility: |  |  |  |  |
Range of volatilities |  |  | 59.80%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  | 61.80%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember
Contractual interest rate |  |  | 8.00%omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualInterestRate / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  | 8.00%omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualInterestRate / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember
Range of equivalent credit risk adjusted yields |  |  | 4.66%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  | 4.29%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember
Maximum [Member] | Monte Carlo Simulations [Member] | Senior Convertible Notes [Member] |  |  |  |  |
Market volatility: |  |  |  |  |
Range of volatilities | 91.20%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_SeniorConvertibleNotesMember |  |  |  |
Range of equivalent volatilities | 69.90%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_SeniorConvertibleNotesMember |  |  |  |
Contractual interest rate | 9.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_SeniorConvertibleNotesMember |  |  |  |
Range of equivalent market risk adjusted interest rates | 9.08%omex_DerivativeFinancialInstrumentsFairValueAssumptionsMarketRiskAdjustedRateRangeOfRates / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_SeniorConvertibleNotesMember |  |  |  |
Risk-free rates | 0.07%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_SeniorConvertibleNotesMember |  |  |  |
Maximum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | First Tranche [Member] |  |  |  |  |
Market volatility: |  |  |  |  |
Range of volatilities |  | 62.20%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 78.10%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  |
Contractual interest rate |  | 11.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 11.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  |
Range of equivalent credit risk adjusted yields |  | 4.45%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 5.27%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheOneMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  |
Maximum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Second Tranche [Member] |  |  |  |  |
Market volatility: |  |  |  |  |
Range of volatilities |  |  | 80.50%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 75.30%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |
Contractual interest rate |  |  | 11.00%omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualInterestRate / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 11.00%omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualInterestRate / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |
Range of equivalent credit risk adjusted yields |  |  | 5.27%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember | 4.61%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheTwoMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |
Maximum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Third Tranche Member] |  |  |  |  |
Market volatility: |  |  |  |  |
Range of volatilities |  |  | 78.10%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  | 79.80%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember
Contractual interest rate |  |  | 11.00%omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualInterestRate / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  | 11.00%omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualInterestRate / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember
Range of equivalent credit risk adjusted yields |  |  | 5.27%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember |  | 4.84%omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates / us-gaap_DebtInstrumentAxis = omex_TrancheThreeMember / us-gaap_DerivativeInstrumentRiskAxis = omex_MonteCarloSimulationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = omex_MonacoNotesMember

X
- Definition Derivative financial instruments fair value assumptions contractual conversion rate. + References No definition available. + Details
Name: | omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualConversionRate
Namespace Prefix: | omex_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Derivative financial instruments fair value assumptions contractual interest rate. + References No definition available. + Details
Name: | omex_DerivativeFinancialInstrumentsFairValueAssumptionsContractualInterestRate
Namespace Prefix: | omex_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Derivative financial instruments fair value assumptions credit risk adjusted yield rate range of rates. + References No definition available. + Details
Name: | omex_DerivativeFinancialInstrumentsFairValueAssumptionsCreditRiskAdjustedYieldRateRangeOfRates
Namespace Prefix: | omex_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Range of effective contractual conversion rates. + References No definition available. + Details
Name: | omex_DerivativeFinancialInstrumentsFairValueAssumptionsEffectOfContractualConversionRates
Namespace Prefix: | omex_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Derivative financial instruments fair value assumptions market risk adjusted rate range of rates. + References No definition available. + Details
Name: | omex_DerivativeFinancialInstrumentsFairValueAssumptionsMarketRiskAdjustedRateRangeOfRates
Namespace Prefix: | omex_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Derivative financial instruments fair value contractual term to maturity. + References No definition available. + Details
Name: | omex_DerivativeFinancialInstrumentsFairValueContractualTermToMaturity
Namespace Prefix: | omex_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value assumptions quoted price. + References No definition available. + Details
Name: | omex_FairValueAssumptionsQuotedPrice
Namespace Prefix: | omex_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | omex_FairValueAssumptionVolatilityRangeAbstract
Namespace Prefix: | omex_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssumptionsExpectedTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssumptionsExpectedVolatilityRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Risk-free interest rate assumption used in valuing an instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssumptionsRiskFreeInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average expected volatility of stock price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=omex_MonteCarloSimulationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |