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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

X

- Definition

Mortgage and loans payable current and non current.

+ References

No definition available.

+ Details

Name:	omex_MortgageAndLoansPayableCurrentAndNonCurrent
Namespace Prefix:	omex_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

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