Stockholders' Equity/(Deficit) - Additional Information (Detail)							1 Months Ended	2 Months Ended	3 Months Ended		6 Months Ended
	Jun. 27, 2025 USD ($)	Apr. 30, 2025 $ / shares shares	Apr. 14, 2025 shares	Mar. 27, 2025 shares	Dec. 23, 2024 USD ($) $ / shares shares	Jun. 10, 2022 USD ($) shares	Jul. 31, 2025 USD ($) $ / shares shares	Aug. 18, 2025 USD ($) $ / shares shares	Jun. 30, 2025 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) shares	Jun. 30, 2025 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) shares	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 $ / shares shares	Dec. 28, 2023 USD ($)	Dec. 01, 2023 USD ($)	Mar. 06, 2023 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Value, Issued \| $									$ 3,249		$ 3,249		$ 2,883
APIC at a fair value \| $					$ 1,500,000				1,000,000
Share-based compensation expense \| $									$ 45,742	$ 101,785	$ 91,484	$ 1,564,532
Common stock, shares issued									32,484,832		32,484,832		28,825,333
Offering cost paid on sale of common stock \| $											$ 97,135	$ 0
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Granted			36,404								36,404
SPA
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued and sold		7,220,141			7,377,912						2,601,595
Purchase price per share \| $ / shares		$ 1.1			$ 0.55
Aggregate purchase price \| $					$ 4,100,000						$ 2,900,000
Remaining options to purchase outstanding									4,618,546		4,618,546
Oceanica Equity Exchange Agreements
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accrued aggregate member interest of adminstrators and officers											1,911,666
Compensation quota aggregate amount of additional fair value \| $											$ 2,029,575
Compensation quota, incremental value \| $	$ 2,029,575
Oceanica Equity Exchange Agreements \| Odyssey's Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued									1,841,137		1,841,137
December 2023 Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Debt instrument face amount \| $															$ 2,250,000	$ 3,750,000
March 2023 Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrants or rights exercise price of warrants or rights \| $ / shares																	$ 1.1
2022 Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, Number of securities called by warrants or rights						4,939,515
Warrants, expiration beginning date						Dec. 10, 2022
Warrants, expiration date						Jun. 10, 2027
Common stock, shares issued						4,939,515
Offering cost paid on sale of common stock \| $						$ 1,800,000
Net proceeds received from sale \| $						$ 14,700,000
2022 Warrants \| Measurement Input, Exercise Price [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long-term debt measurement input						3.35
2022 Warrants \| Measurement Input, Share Price [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long-term debt measurement input						3.35
First tranche \| December 2023 Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrants or rights exercise price of warrants or rights \| $ / shares														$ 1.23
Second tranche \| December 2023 Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrants or rights exercise price of warrants or rights \| $ / shares														$ 2.05
Maximum [Member] \| March 2023 Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, Number of securities called by warrants or rights																	3,703,704
Maximum [Member] \| First tranche \| December 2023 Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, Number of securities called by warrants or rights														1,411,765
Maximum [Member] \| Second tranche \| December 2023 Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, Number of securities called by warrants or rights														211,565
Subsequent Event [Member] \| SPA
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued and sold								4,373,893
Aggregate purchase price \| $								$ 4,800,000
Remaining options to purchase outstanding								0
Class of warrants or rights exercise price of warrants or rights \| $ / shares								$ 1.1
Consultant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued									225,500	225,500	225,500	225,500
Common Stock \| Oceanica Equity Exchange Agreements
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exchange value per share \| $ / shares									$ 1.12		$ 1.12
Common Stock \| Subsequent Event [Member] \| SPA
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued and sold							4,373,893
Aggregate purchase price \| $							$ 4,800,000
Class of warrants or rights exercise price of warrants or rights \| $ / shares							$ 1.1
Common Stock \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options granted				7,500
Member Interests \| Oceanica Equity Exchange Agreements
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exchange value per share \| $ / shares									$ 0.017		$ 0.017

ODYSSEY MARINE EXPLORATION INC 10-Q