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Fair Value Measurements - Summary of Fair Value Hierarchy for Financial Liabilities Measured At Fair Value on a Recurring Basis (Detail) - Level 3 [Member] - USD ($)	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Liabilities [Abstract]
37N Note embedded derivative	$ 0	$ 702,291
Put option liability	0	5,637,162
Litigation financing	56,950,377	52,115,647
2022 Warrants	2,060,773	13,399,822
March 2023 Warrants	1,910,950	0
December 2023 Warrants	827,036	2,392,563
March 2023 Note Conversion Option	2,745,000	0
December 2023 Note Conversion Option	307,000	0
Total of fair valued liabilities	$ 64,801,136	$ 74,247,485	$ 58,971,415

X

- Definition

Estimated litigation reserve liability

+ References

No definition available.

+ Details

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Balance Type:	credit
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X

- Definition

Note conversion option one.

+ References

No definition available.

+ Details

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- Definition

Note conversion option two.

+ References

No definition available.

+ Details

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X

- Definition

Warrant liability one.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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X

- Definition

Warrant liability three.

+ References

No definition available.

+ Details

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- Definition

Warrant liability two

+ References

No definition available.

+ Details

Name:	omex_WarrantLiabilityTwo
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X

- Definition

Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4B
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B

+ Details

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X

- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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- References

No definition available.

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X

- Definition

Fair value of shares that would be issued upon settlement of option contract indexed to equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

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