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Accrued Expenses - Additional Information (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Earnest Money Deposit	$ 657,331	$ 450,000
CIC [Member]
Earnest Money Deposit		$ 450,000

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

- Details

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