XML 98 R60.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Property and Equipment - Additional Information (Detail) (USD $) | 12 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2014
Property, Plant and Equipment [Line Items] |  |  |  |
Depreciation charge | $ 5,510,909 us-gaap_Depreciation | $ 1,937,641 us-gaap_Depreciation | $ 1,589,133 us-gaap_Depreciation |
Dorado Discovery Vessel [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Depreciation charge |  |  |  | $ 3,000,000 us-gaap_Depreciation / us-gaap_BusinessAcquisitionAxis = omex_DoradoDiscoveryVesselMember

X
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
Name: | us-gaap_Depreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=omex_DoradoDiscoveryVesselMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |