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Subsequent Events - Additional Information (Detail) - USD ($)
Mar. 18, 2015
May. 10, 2012
Subsequent Event [Line Items]    
Aggregate amount of Notes   $ 8,000,000
Epsilon Acquisitions, LLC [Member] | Notes Payable, Other Payables [Member]    
Subsequent Event [Line Items]    
Aggregate amount of Notes $ 3,000,000  
Installment amount of Notes $ 1,500,000  
Interest rate of Notes 10.00%  
Notes security description We granted security interests to Epsilon in (a) the 54 million cuotas (at unit of ownership under Panamanian law) of Oceanica Resources S. de R.L. ("Oceanica") held by our wholly owned subsidiary, Odyssey Marine Enterprises, Ltd. ("OME"), (b) all notes and other receivables from Oceanica and its subsidiary owed to us, and (c) all of the outstanding equity in OME.  
Conversion price of Notes $ 5.00  
Conversion price of Notes upon default $ 2.50  
Debt instrument maturity date Mar. 18, 2017  
Minosa [Member] | Notes Payable, Other Payables [Member]    
Subsequent Event [Line Items]    
Aggregate amount of Notes $ 14,750,000  
Debt Instrument, acceleration clause description The obligations under the Note may be accelerated upon the occurrence of specified events of default including (t) OME’s failure to pay any amount payable under the Note on the date due and payable; (u) OME or we fail to perform or observe any term, covenant, or agreement in the Note or the related documents, subject to a five-day cure period; (v) an event of default or material breach by OME, us or any of our affiliates under any of the other loan documents shall have occurred and all grace periods, if any, applicable thereto shall have expired; (w) the Stock Purchase Agreement shall have been terminated; (x) specified dissolution, liquidation, insolvency, bankruptcy, reorganization, or similar cases or actions are commenced by or against OME or any of its subsidiaries, in specified circumstances unless dismissed or stayed within 60 days; (y) the entry of judgment or award against OME or any of its subsidiaries in excess or $100,000; and (z) a change in control (as defined in the Note) occurs.