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Accrued Expenses - Additional Information (Detail) - USD ($)	Sep. 30, 2025	Dec. 31, 2024
Payables and Accruals [Line Items]
Earnest Money Deposit	$ 525,000	$ 450,000
CIC [Member]
Payables and Accruals [Line Items]
Earnest Money Deposit	$ 500,000

X

- Definition

Earnest money deposit.

+ References

No definition available.

+ Details

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

X

- Definition

Payables and accruals.

+ References

No definition available.

+ Details

Name:	omex_PayablesAndAccrualsLineItems
Namespace Prefix:	omex_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_CounterpartyNameAxis=omex_DeepSeaMineralCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: