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Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	6 Months Ended
	May 31, 2012	Jun. 30, 2012
Commitments and Contingencies (Textual) [Abstract]
Number of securities owned		0
Project financing		$ 10
Estimated cost of the project		13
Maximum [Member]
Commitments and Contingencies (Textual) [Abstract]
Renewed term loan payment		5
Amended senior convertible note		15
Property and Equipment , Estimated Useful life		10 years
Minimum [Member]
Commitments and Contingencies (Textual) [Abstract]
Renewed term loan payment		$ 3
Amended senior convertible note	8
Property and Equipment , Estimated Useful life		3 years

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- Details

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- Definition

Estimated project costs.

+ References

No definition available.

+ Details

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Namespace Prefix:	omex_
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Balance Type:	debit
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- Definition

Number of securities owned.

+ References

No definition available.

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- Definition

Payments on term loan.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

Project financing.

+ References

No definition available.

+ Details

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Balance Type:	debit
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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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- Definition

Information regarding derivative transactions entered into in connection with the issuance of contingently convertible securities that may be useful in explaining the potential impact of the contingently convertible securities. This information may include the terms of the derivative transaction (including settlement terms), how the transactions relate to the contingently convertible securities, and the number of shares underlying the derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS129-1

-Paragraph 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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