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Derivative Financial Instruments - Significant Assumptions Utilized in Valuation Technique (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2015 $ / shares
Derivative [Line Items]
Underlying price per share used in the MCS calculations	$ 2.5
Oceanica Resources S. de. R.L [Member]
Derivative [Line Items]
Percentage of shares purchased by private investor	24.00%
Per share value of shares purchased by private investor	$ 2.5

X

- Definition

Fair value assumptions quoted price.

+ References

No definition available.

+ Details

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X

- Definition

Percentage of shares purchased by agent in private placement.

+ References

No definition available.

+ Details

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Namespace Prefix:	omex_
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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

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X

- Details

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