Class of warrant or right expiration beginning date.

No definition available.

Name:	omex_ClassOfWarrantOrRightExpirationBeginningDate
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- Definition

Class of warrant or right expiration date.

+ References

No definition available.

+ Details

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- Definition

Closing price.

+ References

No definition available.

+ Details

Name:	omex_ClosingPrice
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Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Common stock share market.

+ References

No definition available.

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Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Eligible employee threshold percentage.

+ References

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

Gain (Loss) on Cuota Appreciation Rights Extinguishment

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Number of stock incentive plans.

+ References

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

Offering fees withheld to cover offering costs.

+ References

No definition available.

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- Definition

Purchase price of warrant.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Unvested in Period, Fair Value.

+ References

No definition available.

+ Details

Name:	omex_SharBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedInPeriodFairValue
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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Share based compensation arrangement by share based payment award equity instruments other than options unvested fair value.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Share based compensation arrangement by share based payment award exercise price condition.

+ References

No definition available.

+ Details

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- Definition

Share based compensation arrangement by share based payment award maximum amount payable in cash per employee.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Share-based compensation arrangement by share-based payment award, non-option equity instruments, vested and outstanding, number.

+ References

No definition available.

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-based compensation arrangements by share-based payment award, stock appreciation rights, price per share of underlying shares.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

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- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

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Data Type:	xbrli:sharesItemType
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Period Type:	instant

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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Data Type:	xbrli:sharesItemType
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Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.

+ References

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-Paragraph 1
-Subparagraph (SX 210.5-02(29))
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-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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- Definition

The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "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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-SubTopic 10
-Section 50
-Paragraph 4
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Period Type:	duration

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

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- Definition

The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only.

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-Paragraph 5
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- Definition

Price of the entity's common stock which would be required to be attained for the conversion feature embedded in the debt instrument to become effective.

+ References

No definition available.

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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.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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-Section 55
-Paragraph 8
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Balance Type:	credit
Period Type:	instant

- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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-Topic 718
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-Section 50
-Paragraph 2
-Subparagraph (i)
-Publisher FASB
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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Data Type:	xbrli:monetaryItemType
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- Definition

The cash inflow from the additional capital contribution to the entity.

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-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
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-URI https://asc.fasb.org//1943274/2147482740/230-10-45-14

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Balance Type:	debit
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- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Data Type:	dtr-types:perShareItemType
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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ References

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Balance Type:	debit
Period Type:	duration

- Definition

Date the equity-based award expires, in YYYY-MM-DD format.

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Stockholders' Equity (Deficit) - Additional Information (Detail)																				9 Months Ended	12 Months Ended
	Dec. 29, 2023 $ / shares shares	Dec. 27, 2023 USD ($) $ / shares	Nov. 15, 2023 shares	Aug. 07, 2023 shares	Jun. 09, 2023 shares	May 24, 2023 shares	Mar. 06, 2023 $ / shares shares	Mar. 03, 2023 $ / shares shares	Dec. 09, 2022 shares	Dec. 08, 2022 shares	Jul. 10, 2022 USD ($) $ / shares shares	Jul. 06, 2022 USD ($)	Jun. 29, 2022 USD ($)	Aug. 14, 2020 $ / shares shares	Aug. 13, 2019 $ / shares	Jul. 09, 2019	Jul. 08, 2019 $ / shares shares	Mar. 26, 2019 shares	Jun. 09, 2015 USD ($) shares	Sep. 30, 2023 USD ($) shares	Dec. 31, 2023 USD ($) IncentivePlan Day $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 28, 2023 USD ($)	Dec. 01, 2023 USD ($)	Jun. 30, 2023 shares	Jun. 10, 2022 $ / shares shares	Mar. 31, 2022 shares	Dec. 31, 2020 $ / shares shares	Aug. 25, 2020 $ / shares shares	Oct. 31, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price \| $ / shares							$ 3.78				$ 3.35															$ 3.35		$ 3.99	$ 4.75	$ 7.155
Number of trading days \| Day																					20
Number of stock incentive plans \| IncentivePlan																					3
Stock incentive plan expiration date																					Aug. 31, 2015
Award authorized by board																		800,000
Share-based compensation expense \| $																					$ 585,654	$ 1,811,551
Number of stock options granted																					264,458	621,348
Aggregate intrinsic values of options exercisable \| $																					$ 520,544	$ 127,605
Aggregate intrinsic values of options outstanding \| $																					872,540	202,587
Aggregate intrinsic values of options exercised \| $																					65,988	0
Unrecognized compensation cost related to unvested \| $																					$ 611,778
Unrecognized compensation cost related to unvested expected remaining																					2 years 7 days
Total fair value of shares vested \| $																					$ 661,321	1,412,087
Total fair value of shares unvested \| $																					$ 1,500,137	$ 998,743
Weighted-average grant date fair value of restricted stock awards \| $ / shares																					$ 4.94	$ 3.27
Number of warrants																					12,797,139	8,392,466
Class of warrant or right, Number of securities called by warrants or rights							3,703,703				4,939,515															90,552	28,363	551,378	1,873,622	700,000
Sale of stock, Number of shares issued in transaction											4,939,515
Offering costs paid on sale of common stock \| $											$ 14,700,000
Warrants, expiration beginning date											Dec. 10, 2022
Warrants, expiration date											Jun. 10, 2027
Proceeds from Issuance of Common Stock \| $																				$ 0	$ 239,303	$ 16,512,375
Purchase price of warrant \| $ / shares											$ 3.35
Gain on Cuota Appreciation Rights extinguishment \| $																						315,235
Debt instrument, convertible, if-converted value in excess of principal \| $												$ 100,000	$ 2,200,000
Conversion of stock, shares issued																				1,000,000
Closing Price							120														200
Common Stock, Capital Shares Reserved for Future Issuance																		678,339
Warrants and Rights Outstanding, Term																												5 years
Aggregate amount issuable \| $																							$ 2,250,000	$ 3,750,000
Common stock, value, issued \| $																				$ 2,007	$ 2,042	1,954
Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options granted									604,243
Third Party Consultant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options granted										17,105
Note And Warrant Purchase Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price \| $ / shares														$ 4.67							$ 12
Number of warrants																					65,625
Class of warrant or right, Number of securities called by warrants or rights														131,816
Warrants, expiration date														Aug. 14, 2023		Jul. 21, 2021	Jul. 12, 2024
Note And Warrant Purchase Agreement [Member] \| Second Amendment Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price \| $ / shares																	$ 5.756
Class of warrant or right, Number of securities called by warrants or rights																	196,135
Termination Agreement [Member] \| MINOSA [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock issued for convertible debt conversion, Shares								304,879
Common stock share market \| $ / shares								$ 3.28
Two Sea Notes Agreement [Member] \| Promissory Note [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate amount issuable \| $																							$ 2,250,000	$ 3,750,000
2015 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award authorized by board																			450,000
Thirty Seven North [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Debt instrument, convertible, if-converted value in excess of principal \| $		$ 360,003
Conversion price of Notes \| $ / shares	$ 2.3226	$ 2.3226
Common stock, value, issued \| $		$ 360,003
Share-Based Payment Arrangement, Tranche One [Member] \| Two Sea Notes Agreement [Member] \| Promissory Note [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price \| $ / shares																					$ 4.25
Class of warrant or right, Number of securities called by warrants or rights																					1,411,769
Closing Price																					120
Share-Based Payment Arrangement, Tranche Two [Member] \| Two Sea Notes Agreement [Member] \| Promissory Note [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price \| $ / shares																					$ 7.09
Class of warrant or right, Number of securities called by warrants or rights																					211,569
Minimum [Member] \| Series AA-2 Convertible Preferred Stock [Member] \| Penelope Mining LLC [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price of common stock \| $ / shares																					$ 15.12
Incentive Stock Options [Member] \| 2015 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award authorized by board																			450,000
Additional shares authorized for stock-based compensation																					200,000
Incentive Stock Options [Member] \| Minimum [Member] \| 2019 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares authorized for stock-based compensation																		1,600,000
Incentive Stock Options [Member] \| Maximum [Member] \| 2019 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares authorized for stock-based compensation																		2.4
Unvested Restricted Stock Awards Excluded from EPS [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of restricted stock, awards vested \| $																					$ 146,647	1,064,331
Fair value of unvested restricted stock awards \| $																					$ 46,905	$ 176,998
Weighted-average remaining contractual term																					0 years	2 years 3 months 18 days
Total unrecognized compensation cost related to unvested restricted stock awards \| $																					$ 34,405
Cuota Appreciation Rights [Member] \| Key Employee Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested and Outstanding																					385,580
Cuota Appreciation Rights [Member] \| Non Employee Director Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested and Outstanding																					292,663
Cuota Appreciation Rights [Member] \| Carrying Value [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Value of cuotas of Oceanica \| $ / shares																					$ 3
Cuota Appreciation Rights [Member] \| Fair Value [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Value of cuotas of Oceanica \| $ / shares															$ 1
Cuota Appreciation Rights [Member] \| Maximum [Member] \| Key Employee Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award authorized by board																					750,000
Cuota Appreciation Rights [Member] \| Maximum [Member] \| Director Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award authorized by board																					600,000
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, Number of securities called by warrants or rights																					90,552				90,552
Proceeds from Issuance of Common Stock \| $											$ 1,800,000
Common stock issued for convertible debt conversion, Shares																					155,000
Common Stock [Member] \| Share-Based Payment Arrangement, Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options granted			417	57,500
Common Stock [Member] \| Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options granted					200,000
Common Stock [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options granted						6,541
Common Stock [Member] \| Thirty Seven North [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Debt instrument, convertible, if-converted value in excess of principal \| $		$ 300,003
Conversion of stock, shares issued	155,000
Common Stock [Member] \| Incentive Stock Options [Member] \| 2015 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price of incentive option granted																					With respect to each grant of an ISO to a participant who is not a ten percent stockholder, the exercise price shall not be less than the fair market value of a share on the date the ISO is granted. With respect to each grant of an ISO to a participant who is a ten percent stockholder, the exercise price shall not be less than one hundred ten percent (110%) of the fair market value of a share on the date the ISO is granted.
Maximum aggregate number of Shares with respect to one or more Awards that may be granted to any one person during any calendar year																			83,333
Maximum aggregate amount of cash that may be paid in cash to any person during any calendar year \| $																			$ 2,000,000
Common Stock [Member] \| Incentive Stock Options [Member] \| Minimum [Member] \| 2015 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Eligible employee threshold percentage																					10.00%
Purchase price of common stock percentage																					(110.00%)