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Consolidated Statements of Changes in Stockholders' Equity / (Deficit) (USD $) | Total | Series D Convertible Preferred Stock [Member] | Common Stock [Member] | Paid-in Capital [Member] | Accumulated Deficit [Member] | Non-controlling Interest [Member]
--- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2011 |  | $ 21 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_SeriesDPreferredStockMember | $ 7,309 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 137,236,462 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (147,018,753)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Beginning Balance, Shares at Dec. 31, 2011 |  | 206,400 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_SeriesDPreferredStockMember | 73,095,384 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued for cash, shares |  |  | 511,650 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued for settlement of senior convertible notes, Shares |  |  | 1,441,013 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued for services, shares |  |  | 368,156 us-gaap_StockIssuedDuringPeriodSharesIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Total stockholders' equity/(deficit) | (20,758,729)us-gaap_StockholdersEquity |  | 7,542 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 144,446,574 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (165,212,866)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Common stock issued for settlement of senior convertible notes |  |  | 144 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 4,262,383 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Net (loss) | (18,184,113)us-gaap_NetIncomeLoss |  |  |  | (18,184,113)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Common stock issued for services |  |  | 37 us-gaap_StockIssuedDuringPeriodValueIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 347,516 us-gaap_StockIssuedDuringPeriodValueIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Dividends |  |  |  |  | (10,000)us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Common stock issued for cash |  |  | 52 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 1,110,419 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Share-based compensation |  |  |  | 1,489,794 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Ending Balance at Dec. 31, 2012 | (20,758,729)us-gaap_StockholdersEquity |  | 7,542 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 144,446,574 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (165,212,866)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Ending Balance, Shares at Dec. 31, 2012 |  |  | 75,416,203 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued for settlement of senior convertible notes, Shares |  |  | 2,010,500 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Ending Balance at Mar. 31, 2013 |  |  |  |  |  |
Beginning Balance at Dec. 31, 2012 | (20,758,729)us-gaap_StockholdersEquity | 21 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_SeriesDPreferredStockMember | 7,542 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 144,446,574 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (165,212,866)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Beginning Balance, Shares at Dec. 31, 2012 |  | 206,400 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_SeriesDPreferredStockMember | 75,416,203 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Preferred stock converted to common, Share |  | (174,000)omex_PreferredStockConvertedToCommonShares / us-gaap_StatementEquityComponentsAxis = us-gaap_SeriesDPreferredStockMember | 174,000 omex_PreferredStockConvertedToCommonShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued for cash, shares |  |  | 4,392,540 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued for settlement of senior convertible notes, Shares |  |  | 3,552,357 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued for services, shares |  |  | 347,477 us-gaap_StockIssuedDuringPeriodSharesIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Total stockholders' equity/(deficit) | 13,206,790 us-gaap_StockholdersEquity | 3 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_SeriesDPreferredStockMember | 8,388 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 193,272,576 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (175,954,138)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (4,120,037)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Common stock issued for settlement of senior convertible notes |  |  | 355 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 9,279,887 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Preferred stock converted to common |  | (18)omex_PreferredStockConvertedToCommon / us-gaap_StatementEquityComponentsAxis = us-gaap_SeriesDPreferredStockMember | 18 omex_PreferredStockConvertedToCommon / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Net (loss) | (10,741,272)us-gaap_NetIncomeLoss |  |  |  | (10,741,272)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (4,120,037)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Common stock issued for services |  |  | 35 us-gaap_StockIssuedDuringPeriodValueIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued for cash |  |  | 438 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 10,360,895 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Share-based compensation |  |  |  | 2,617,278 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Sale of subsidiary stock | 625,000 omex_StockIssuedDuringPeriodValueSaleOfSubsidiaryStock |  |  | 27,500,000 omex_StockIssuedDuringPeriodValueSaleOfSubsidiaryStock / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Purchase of subsidiary stock |  |  |  | (1,250,000)omex_AdjustmentsToAdditionalPaidInCapitalSubsidiaryStockRepurchase / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Settlement of vendor payable with subsidiary stock |  |  |  | 625,000 omex_AdjustmentsToAdditionalPaidInCapitalSettlementOfVendorPayableWithSubsidiaryStock / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Retained earnings of subsidiary acquisition |  |  |  | (307,059)omex_AdjustmentsToAdditionalPaidInCapitalRetainedEarningsOfSubsidiaryAcquisition / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Ending Balance at Dec. 31, 2013 | 13,206,790 us-gaap_StockholdersEquity | 3 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_SeriesDPreferredStockMember | 8,388 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 193,272,576 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (175,954,138)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (4,120,037)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Ending Balance, Shares at Dec. 31, 2013 |  | 32,400 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_SeriesDPreferredStockMember | 83,882,577 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Beginning Balance at Sep. 30, 2013 |  |  |  |  |  |
Common stock issued for settlement of senior convertible notes, Shares |  |  | 1,725,000 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Total stockholders' equity/(deficit) |  |  | 8,388 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Ending Balance at Dec. 31, 2013 | 13,206,790 us-gaap_StockholdersEquity |  | 8,388 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 193,272,576 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (175,954,138)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (4,120,037)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Ending Balance, Shares at Dec. 31, 2013 |  |  | 83,882,577 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued for settlement of senior convertible notes, Shares |  |  | 1,290,155 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued for services, shares |  |  | 409,770 us-gaap_StockIssuedDuringPeriodSharesIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Total stockholders' equity/(deficit) | (10,404,472)us-gaap_StockholdersEquity | 3 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_SeriesDPreferredStockMember | 8,558 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 198,323,630 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (202,427,252)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (6,309,411)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Common stock issued for settlement of senior convertible notes |  |  | 129 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 2,420,734 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Net (loss) | (26,473,114)us-gaap_NetIncomeLoss |  |  |  | (26,473,114)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (2,189,374)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Common stock issued for services |  |  | 41 us-gaap_StockIssuedDuringPeriodValueIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Share-based compensation |  |  |  | 2,380,320 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Settlement of financing fee with subsidiary stock |  |  |  | 250,000 omex_AdjustmentsToAdditionalPaidInCapitalSettlementOfFinancingFeeWithSubsidiaryStock / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Ending Balance at Dec. 31, 2014 | $ (10,404,472)us-gaap_StockholdersEquity | $ 3 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_SeriesDPreferredStockMember | $ 8,558 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 198,323,630 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (202,427,252)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (6,309,411)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Ending Balance, Shares at Dec. 31, 2014 |  | 32,400 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_SeriesDPreferredStockMember | 85,582,502 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |

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