XML 55 R43.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Loans Payable - Summary of Fair Value of Debt (Detail) - USD ($) | Sep. 30, 2018 | Mar. 31, 2016
--- | --- | ---
Note 2 [Member] |  |
Forward cash flows: |  |
Principal |  | $ 1,825,000
Monaco Notes [Member] |  |
Forward cash flows: |  |
Principal | $ 2,800,000 |
Monaco Notes [Member] | Note 2 [Member] |  |
Forward cash flows: |  |
Principal | 2,800,000 |
Interest | 559,463 |
Total forward cash flows | 3,359,463 |
Present value of forward cash flows | 2,554,371 |
Fair value of equity conversion option | 1,063,487 |
Fair value of debt | $ 3,617,858 |

X
- Definition Debt instrument forward cash flows interest. + References No definition available. + Details
Name: | omex_DebtInstrumentForwardCashFlowsInterest
Namespace Prefix: | omex_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt instrument forward cash flows net. + References No definition available. + Details
Name: | omex_DebtInstrumentForwardCashFlowsNet
Namespace Prefix: | omex_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt instrument present value of forward cash flows. + References No definition available. + Details
Name: | omex_DebtInstrumentPresentValueOfForwardCashFlows
Namespace Prefix: | omex_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt Instruments Forward cash flows [Abstract] + References No definition available. + Details
Name: | omex_DebtInstrumentsForwardCashFlowsAbstract
Namespace Prefix: | omex_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 + Details
Name: | us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 + Details
Name: | us-gaap_DebtInstrumentFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=omex_NoteTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=omex_MonacoNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |