XML 72 R59.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Derivative Financial Instruments - Significant Assumptions Utilized in Binomial Lattice Process (Detail) - $ / shares | 6 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2016 | Dec. 31, 2015 | Mar. 31, 2016 | Dec. 01, 2014 | Oct. 01, 2014 | Aug. 14, 2014 | Dec. 31, 2013
Derivative [Line Items] |  |  |  |  |  |  |
Quoted market price on valuation date |  | $ 2.50 | $ 1.25 | $ 2.50 | $ 2.50 | $ 2.50 | $ 2.50
Level 3 [Member] | Derivative Financial Instruments, Assets [Member] |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Linked common shares | 130,208 | 130,208 |  |  |  |  |
Quoted market price on valuation date | $ 2.02 | $ 3.24 |  |  |  |  |
Contractual exercise price | $ 43.20 | $ 43.20 |  |  |  |  |
Term (years) | 1 year 1 month 6 days | 1 year 4 months 6 days |  |  |  |  |
Level 3 [Member] | Minimum [Member] | Derivative Financial Instruments, Assets [Member] |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Range of market volatilities | 66.20% | 92.90% |  |  |  |  |
Risk free rates using zero coupon US Treasury Security rates | 0.20% | 0.16% |  |  |  |  |
Level 3 [Member] | Maximum [Member] | Derivative Financial Instruments, Assets [Member] |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Range of market volatilities | 188.10% | 113.20% |  |  |  |  |
Risk free rates using zero coupon US Treasury Security rates | 0.36% | 0.65% |  |  |  |  |

X
- Definition Fair Value Assumptions Linked Common Shares + References No definition available. + Details
Name: | omex_FairValueAssumptionsLinkedCommonShares
Namespace Prefix: | omex_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fair value assumptions quoted price. + References No definition available. + Details
Name: | omex_FairValueAssumptionsQuotedPrice
Namespace Prefix: | omex_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Risk free rates using zero coupon country treasury security range of rates. + References No definition available. + Details
Name: | omex_RiskFreeRatesUsingZeroCouponCountryTreasurySecurityRangeOfRates
Namespace Prefix: | omex_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DerivativeTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Agreed upon price for the exchange of the underlying asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssumptionsExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssumptionsExpectedVolatilityRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_DerivativeFinancialInstrumentsAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |