Debt instrument maximum borrowing capacity.

No definition available.

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

- Definition

Debt instrument threshold payment term.

+ References

No definition available.

+ Details

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Namespace Prefix:	omex_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Pledged units of ownership.

+ References

No definition available.

+ Details

Name:	omex_PledgedUnitsOfOwnership
Namespace Prefix:	omex_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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+ Details

Name:	us-gaap_DebtInstrumentConvertibleConversionPrice1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=omex_MinosaTwoMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=omex_PromissoryNoteMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Loans Payable - MINOSA 2 (Additional Information) (Details)			3 Months Ended
	Jul. 15, 2021 USD ($)	Aug. 10, 2017 USD ($) Cuota Days $ / shares	Mar. 31, 2023
MINOSA 2
Debt instrument, threshold payment term			60 days
Long-Term Debt	$ 404,633
Debt, interest expense	$ 159,082
MINOSA 2 \| Promissory Note [Member] \| Share Purchase Agreement [Member]
Conversion price \| $ / shares		$ 4.35
MINOSA 2 \| Loans Payable [Member]
Interest rate, stated percentage		10.00%
Debt instrument, threshold payment term		60 days
Number of trading days \| Days		75
Conversion price \| $ / shares		$ 4.35
Epsilon Acquisitions, LLC [Member] \| Notes Payable, Other Payables [Member]
Debt conversion amount		$ 2,000,000.0
Pledged units of ownership \| Cuota		54,000,000
Minosa Purchase Agreement [Member] \| Loans Payable [Member]
Debt , maximum borrowing capacity		$ 3,000,000.0
Amount of loan outstanding		$ 2,700,000