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Income Taxes - Schedule of Income (Loss) Before Income Taxes (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Alternative Minimum Tax Rate	20.00%

X

- Definition

Alternative minimum tax rate.

+ References

No definition available.

+ Details

Name:	omex_AlternativeMinimumTaxRate
Namespace Prefix:	omex_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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