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Deferred Revenue - Additional Information (Detail) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013 Contract	Dec. 31, 2012
Deferred Revenue Disclosure [Abstract]
Marine services obligations	$ 2,835,522	$ 2,835,522
Number of service contract with service obligation	2

X

- Definition

Marine services obligations deferred revenue.

+ References

No definition available.

+ Details

Name:	omex_MarineServicesObligationsDeferredRevenue
Namespace Prefix:	omex_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Number of service contracts under service obligation.

+ References

No definition available.

+ Details

Name:	omex_NumberOfServiceContractsUnderServiceObligation
Namespace Prefix:	omex_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

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