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Summary of Significant Accounting Policies - Reconciliation of Numerators and Denominators used in Computing Basic and Diluted Net Income Per Share (Detail) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Accounting Policies [Abstract]        
Net (loss) income attributable to Odyssey Marine Exploration, Inc. $ (1,527,103) $ (4,931,609) $ 1,970,921 $ 17,376,078
Numerator:        
Basic net (loss) income available to stockholders (1,527,103) (4,931,609) 1,970,921 17,376,078
Fair value change inof debt instruments 0 0 (243,253) 0
Fair value change of warrants 0 0 (682,667) 0
Fair value change of convertible debt 0 0 (354,411) 0
Diluted net (loss) income available to stockholders $ (1,527,103) $ (4,931,609) $ 690,590 $ 17,376,078
Denominator:        
Weighted average common shares outstanding - Basic 20,481,072 19,918,677 20,453,503 19,793,265
Dilutive effect of options 0 0 69,816 4,533
Dilutive effect of restricted stock awards 0 0 3,871,880 171,361
Dilutive effect of warrants 0 0 1,777,412 0
Dilutive effect of convertible instruments 0 0 189,502 88,735
Weighted average common shares outstanding 20,481,072 19,918,677 26,362,113 20,057,894
Net (loss) income per share:        
Basic $ (0.07) $ (0.25) $ 0.1 $ 0.88
Diluted $ (0.07) $ (0.25) $ 0.03 $ 0.87