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v2.4.1.9

Accrued Expenses - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2014
Payables and Accruals [Abstract] |
Percentage of expense received | 20.00%omex_PercentageOfReimbursementOfSearchAndRecoveryExpenses

X
- Definition Percentage of reimbursement of search and recovery expenses. + References No definition available. + Details
Name: | omex_PercentageOfReimbursementOfSearchAndRecoveryExpenses
Namespace Prefix: | omex_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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