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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, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Accounting Policies [Abstract]        
Net (loss) income attributable to Odyssey Marine Exploration, Inc. $ (14,847,963) $ (1,527,103) $ (12,606,393) $ 1,970,921
Numerator:        
Basic net (loss) income available to stockholders (14,847,963) (1,527,103) (12,606,393) 1,970,921
Fair value change of debt instruments 0 0 0 (243,253)
Fair value change of warrants 0 0 0 (682,667)
Fair value change of convertible debt 0 0 0 (354,411)
Diluted net (loss) income available to stockholders $ (14,847,963) $ (1,527,103) $ (12,606,393) $ 690,590
Denominator:        
Weighted average common shares outstanding - Basic 30,750,588 20,481,072 29,931,163 20,453,503
Dilutive effect of options 0 0 0 69,816
Dilutive effect of other derivative instruments 0 0 0 3,871,880
Dilutive effect of warrants 0 0 0 1,777,412
Dilutive effect of convertible debt instruments 0 0 0 189,502
Weighted average common shares outstanding - Diluted 30,750,588 20,481,072 29,931,163 26,362,113
Net (loss) income per share:        
Basic $ (0.48) $ (0.07) $ (0.42) $ 0.1
Diluted $ (0.48) $ (0.07) $ (0.42) $ 0.03