Subsequent Events	12 Months Ended
Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	NOTE U – SUBSEQUENT EVENTS (UNAUDITED) Note Purchase Agreement On March 18, 2015 we entered into a Note Purchase Agreement (“Note”) with Epsilon Acquisitions, LLC (“Epsilon”). Pursuant to the Note, Epsilon will loan us $3.0 million in two installments of $1.5 million due on March 31, 2016 and April 30, 2016. The Note bears interest at a rate of 10% per annum and matures on March 18, 2017. In Pledge agreements related to the Note, 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. At any time after Epsilon has advanced the full $3.0 million to us, Epsilon has the right to convert all amounts outstanding under the Note into shares of our common stock upon 75 days’ notice to us or upon a merger, consolidation, third party tender offer, or similar transaction relating to us at the conversion price of $5.00 per share, which represents the five-day volume-weighted average price of Odyssey’s common stock for the five trading day period ending on March 17, 2016. Upon the occurrence and during the continuance of an event of default, the conversion price will be reduced to $2.50 per share. Following any conversion of the indebtedness, Penelope Mining LLC, (an affiliate of Epsilon) (“Penelope”), may elect to reduce its commitment to purchase preferred stock of Odyssey under the Stock Purchase Agreement, dated as of March 11, 2015 (as amended, the “Stock Purchase Agreement”), among Odyssey, Penelope, and Minera del Norte, S.A. de C.V. (“Minosa”) by the amount of indebtedness converted. Pursuant to the Note Purchase Agreement (a) we agreed to waive our rights to terminate the Stock Purchase Agreement in accordance with the terms thereof until December 31, 2016, and (b) Minosa agreed to extend, until December 31, 2016, the maturity date of the $14.75 million loan extended by Minosa to OME pursuant to the Stock Purchase Agreement. 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. In connection with the execution and delivery of the Note Purchase Agreement, we and Epsilon entered into a registration rights agreement pursuant to which we agreed to register new shares of our common stock with a formal registration statement with the Securities and Exchange Commission upon the conversion of the indebtedness evidenced by the Note.

NOTE U – SUBSEQUENT EVENTS (UNAUDITED)

Note Purchase Agreement

On March 18, 2015 we entered into a Note Purchase Agreement (“Note”) with Epsilon Acquisitions, LLC (“Epsilon”). Pursuant to the Note, Epsilon will loan us $3.0 million in two installments of $1.5 million due on March 31, 2016 and April 30, 2016. The Note bears interest at a rate of 10% per annum and matures on March 18, 2017. In Pledge agreements related to the Note, 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. At any time after Epsilon has advanced the full $3.0 million to us, Epsilon has the right to convert all amounts outstanding under the Note into shares of our common stock upon 75 days’ notice to us or upon a merger, consolidation, third party tender offer, or similar transaction relating to us at the conversion price of $5.00 per share, which represents the five-day volume-weighted average price of Odyssey’s common stock for the five trading day period ending on March 17, 2016. Upon the occurrence and during the continuance of an event of default, the conversion price will be reduced to $2.50 per share. Following any conversion of the indebtedness, Penelope Mining LLC, (an affiliate of Epsilon) (“Penelope”), may elect to reduce its commitment to purchase preferred stock of Odyssey under the Stock Purchase Agreement, dated as of March 11, 2015 (as amended, the “Stock Purchase Agreement”), among Odyssey, Penelope, and Minera del Norte, S.A. de C.V. (“Minosa”) by the amount of indebtedness converted.

Pursuant to the Note Purchase Agreement (a) we agreed to waive our rights to terminate the Stock Purchase Agreement in accordance with the terms thereof until December 31, 2016, and (b) Minosa agreed to extend, until December 31, 2016, the maturity date of the $14.75 million loan extended by Minosa to OME pursuant to the Stock Purchase Agreement. 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.

In connection with the execution and delivery of the Note Purchase Agreement, we and Epsilon entered into a registration rights agreement pursuant to which we agreed to register new shares of our common stock with a formal registration statement with the Securities and Exchange Commission upon the conversion of the indebtedness evidenced by the Note.