XML 106 R63.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Investment in Unconsolidated Entity - Additional Information (Detail) (USD $) | 0 Months Ended | 12 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Apr. 30, 2014 | Dec. 31, 2013 | Dec. 31, 2014 | Jun. 30, 2012 | Sep. 30, 2013 | Dec. 31, 2011
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Common shares received in settlement of accounts receivable/Preferred Non-Voting Class A stock | 5,225 us-gaap_DebtConversionConvertedInstrumentSharesIssued1 |  |  |  |  |
Preferred Voting Class A stock | 522,500 us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion |  |  |  |  |
Face Value $10,000,000, 8% Convertible Senior Note Payable [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Convertible notes |  |  |  |  | $ 500,000 omex_DebtInstrumentIssuedFaceAmount / us-gaap_ShortTermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
Convertible notes, interest rate |  | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_ShortTermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember | 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_ShortTermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |  |  |
Convertible notes, maturity date |  | Apr. 26, 2014 |  |  |  |
Neptune Minerals, Inc. [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Net share position in NMI |  |  | 6,190,201 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_BusinessAcquisitionAxis = omex_NeptuneMineralsIncorporatedMember |  |  |
Ownership percentage |  |  | 29.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_BusinessAcquisitionAxis = omex_NeptuneMineralsIncorporatedMember |  |  |
Investment carrying value |  |  | 0 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_BusinessAcquisitionAxis = omex_NeptuneMineralsIncorporatedMember |  |  |
Neptune Minerals, Inc. [Member] | Face Value $10,000,000, 8% Convertible Senior Note Payable [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Convertible notes, interest rate |  | 6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_BusinessAcquisitionAxis = omex_NeptuneMineralsIncorporatedMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |  |  |  |
Neptune Minerals, Inc. [Member] | Common Class A [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Shares owned |  |  | 0 omex_EquityMethodInvestmentsSharesOwned / us-gaap_BusinessAcquisitionAxis = omex_NeptuneMineralsIncorporatedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |  |
Neptune Minerals, Inc. [Member] | Common Class B [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Net share position in NMI |  |  | 6,184,976 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_BusinessAcquisitionAxis = omex_NeptuneMineralsIncorporatedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  |  |
Neptune Minerals, Inc. [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Net share position in NMI |  |  | 5,225 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_BusinessAcquisitionAxis = omex_NeptuneMineralsIncorporatedMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |
Neptune Minerals, Inc. [Member] | Series A Voting Shares [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Investment carrying value | 522,500 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_BusinessAcquisitionAxis = omex_NeptuneMineralsIncorporatedMember / us-gaap_StatementClassOfStockAxis = omex_SeriesOneVotingSharesMember |  |  |  |  |
Dorado Ocean Resources, Ltd. [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Ownership percentage |  |  |  |  |  | 41.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_BusinessAcquisitionAxis = omex_DoradoOceanResourcesLimitedMember
Loss from unconsolidated entity |  |  | 20,700,000 omex_CumulativeAndOutstandingLosses / us-gaap_BusinessAcquisitionAxis = omex_DoradoOceanResourcesLimitedMember |  |  |
Chatham Rock Phosphate, Ltd. [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Investment carrying value |  |  | 0 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_BusinessAcquisitionAxis = omex_ChathamRockPhosphateLtdMember |  |  |
Deep sea mining exploratory services |  |  |  | $ 1,680,000 omex_MiningExploratoryServiceRevenue / us-gaap_BusinessAcquisitionAxis = omex_ChathamRockPhosphateLtdMember |  |
Shares received from CRP |  |  |  | 9,320,348 omex_SharesReceivedFromUnconsolidatedEntities / us-gaap_BusinessAcquisitionAxis = omex_ChathamRockPhosphateLtdMember |  |
Chatham Rock Phosphate, Ltd. [Member] | Maximum [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity stake in CRP |  |  | 10.00%us-gaap_MinorityInterestOwnershipPercentageByParent / us-gaap_BusinessAcquisitionAxis = omex_ChathamRockPhosphateLtdMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |

X
- Definition Cumulative and outstanding losses. + References No definition available. + Details
Name: | omex_CumulativeAndOutstandingLosses
Namespace Prefix: | omex_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Debt instrument issued face amount. + References No definition available. + Details
Name: | omex_DebtInstrumentIssuedFaceAmount
Namespace Prefix: | omex_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Equity method investments shares owned. + References No definition available. + Details
Name: | omex_EquityMethodInvestmentsSharesOwned
Namespace Prefix: | omex_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Mining exploratory service revenue. + References No definition available. + Details
Name: | omex_MiningExploratoryServiceRevenue
Namespace Prefix: | omex_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Shares received from unconsolidated entities. + References No definition available. + Details
Name: | omex_SharesReceivedFromUnconsolidatedEntities
Namespace Prefix: | omex_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "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 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: 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
Name: | us-gaap_ConversionOfStockSharesConverted1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares issued for each share of convertible preferred stock that is converted. + 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 29 -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 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 + Details
Name: | us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- 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
Name: | us-gaap_DebtConversionConvertedInstrumentSharesIssued1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
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
- 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
Name: | us-gaap_DebtInstrumentMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. + 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 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=omex_ChathamRockPhosphateLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=omex_DoradoOceanResourcesLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=omex_NeptuneMineralsIncorporatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShortTermDebtTypeAxis=us-gaap_ConvertibleNotesPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |