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Mortgage and Loans Payable (Details) (USD $) | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Schedule of consolidated debt |  |
Company's consolidated debt | $ 16,272,296 | $ 18,820,683
Term loan [Member] |  |
Schedule of consolidated debt |  |
Company's consolidated debt | 5,000,000 | 5,000,000
Face value $10,000,000, 8% Convertible Senior Note Payable [Member] |  |
Schedule of consolidated debt |  |
Company's consolidated debt | 5,619,424 | 8,234,367
Face value $8,000,000, 9% Convertible Senior Note Payable [Member] |  |
Schedule of consolidated debt |  |
Company's consolidated debt | 3,733,325 | 3,628,779
Mortgage payable [Member] |  |
Schedule of consolidated debt |  |
Company's consolidated debt | $ 1,919,547 | $ 1,957,537

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- Definition Mortgage and loans payable current and non current. + References No definition available. + Details
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Namespace Prefix: | omex_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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