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v2.4.1.9

Related Party Transactions - Additional Information (Detail) | 0 Months Ended |
--- | --- | ---
Dec. 09, 2002 Directors | May 26, 1998
Related Party Transaction [Line Items] |  |
Post finance cost proceeds | 5.00%omex_PercentageOfProceedsFromShipwrecksReceivableUnderAgreement | 5.00%omex_PercentageOfProceedsFromShipwrecksReceivableUnderAgreement
Georgia LLC [Member] |  |
Related Party Transaction [Line Items] |  |
Post finance cost proceeds | 5.00%omex_PercentageOfProceedsFromShipwrecksReceivableUnderAgreement / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = omex_GeorgiaLimitedLiabilityCompanyMember |
Directors' interest in ownership of Company | 58.00%omex_OwnershipPercentageOfDirectorAndOfficersInRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = omex_GeorgiaLimitedLiabilityCompanyMember |
Officers and directors owning an interest in the limited liability | 2 omex_NumberOfOfficersAndDirectorsOwningInterestInLimitedLiabilityCompany / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = omex_GeorgiaLimitedLiabilityCompanyMember |

X
- Definition Number of officers and directors owning interest in limited liability company. + References No definition available. + Details
Name: | omex_NumberOfOfficersAndDirectorsOwningInterestInLimitedLiabilityCompany
Namespace Prefix: | omex_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Ownership percentage of director and officers in related party. + References No definition available. + Details
Name: | omex_OwnershipPercentageOfDirectorAndOfficersInRelatedParty
Namespace Prefix: | omex_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of proceeds from shipwrecks receivable under agreement. + References No definition available. + Details
Name: | omex_PercentageOfProceedsFromShipwrecksReceivableUnderAgreement
Namespace Prefix: | omex_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=omex_GeorgiaLimitedLiabilityCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |