Common shares issued per unit.

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- Definition

Investment for future revenue rights.

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- Definition

Investment multiplier in case of project success.

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- Definition

Number of projects after bifurcation.

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- Definition

Percentage of revenue owed to certificate holders.

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- Definition

Percentage of revenue owed to certificate holders per unit.

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- Definition

Revenue owed to certificate holders.

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No definition available.

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- Definition

Revenue participation agreement value.

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No definition available.

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- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

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- Definition

Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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- Definition

The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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Amount of refund payments made to customers during the period that was previously reported as deferred revenue. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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Amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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- Definition

The carrying value per unit of investment at date of related balance sheet.

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Deferred Income and Revenue Participation Rights - Additional Information (Detail) (USD $)	12 Months Ended	1 Months Ended
	Dec. 31, 2014 Project Investment	Feb. 28, 2011	Dec. 31, 2013	Mar. 31, 2013
Deferred Revenue Arrangement [Line Items]
Deferred income from revenue participation rights	4,643,750us-gaap_DeferredRevenueNoncurrent		$ 4,643,750us-gaap_DeferredRevenueNoncurrent
Revenue participation agreement	15,000,000omex_RevenueParticipationAgreementValue
Deferred income and participating revenue rights	4,643,750us-gaap_DeferredRevenue		6,484,154us-gaap_DeferredRevenue
"Cambridge" Project [Member]
Deferred Revenue Arrangement [Line Items]
Deferred income and participating revenue rights	825,000		825,000
"Seattle" Project [Member]
Deferred Revenue Arrangement [Line Items]
Percentage of revenue owed to certificate holder per each million invested	1.00%
Common shares issued per unit	100,000
Deferred income and participating revenue rights	62,500		62,500
Galt Resources, LLC [Member]
Deferred Revenue Arrangement [Line Items]
Percentage of revenue owed to certificate holders	50.00%
Percentage of revenue owed to certificate holder per each million invested	1.00%
Investment multiplier in case of project success	3
Projects after bifurcation	2
Galt Resources, LLC [Member] \| SS Gairsoppa [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	3,756,250
Deferred income from revenue participation rights				12,506,755
Galt Resources, LLC [Member] \| Maximum [Member]
Deferred Revenue Arrangement [Line Items]
Investment for future revenue rights		7,512,500
Marine Services Projects [Member]
Deferred Revenue Arrangement [Line Items]
Deferred income and participating revenue rights	0		1,840,404
Deferred revenue,return of funds	1,400,000
Deferred revenue,Accounts payable	1,840,404
HMS Victory Project [Member]
Deferred Revenue Arrangement [Line Items]
Percentage of revenue owed to certificate holders	7.5125%
First Payment [Member] \| "Cambridge" Project [Member]
Deferred Revenue Arrangement [Line Items]
Percentage of revenue owed to certificate holders	100.00%
Revenue owed to certificate holder	825,000
Second Payment [Member] \| "Cambridge" Project [Member]
Deferred Revenue Arrangement [Line Items]
Percentage of revenue owed to certificate holders	24.75%
Second Payment [Member] \| "Cambridge" Project [Member] \| Minimum [Member]
Deferred Revenue Arrangement [Line Items]
Revenue owed to certificate holder	4,000,000
Second Payment [Member] \| "Cambridge" Project [Member] \| Maximum [Member]
Deferred Revenue Arrangement [Line Items]
Revenue owed to certificate holder	35,000,000
Third Payment [Member] \| "Cambridge" Project [Member]
Deferred Revenue Arrangement [Line Items]
Percentage of revenue owed to certificate holders	12.375%
Revenue owed to certificate holder	35,000,000
Revenue Participation Certificates [Member] \| "Cambridge" Project [Member]
Deferred Revenue Arrangement [Line Items]
Revenue participation certificates per unit value	50,000
Revenue Participation Certificates [Member] \| "Seattle" Project [Member]
Deferred Revenue Arrangement [Line Items]
Revenue participation certificates per unit value	50,000