XML 80 R87.htm IDEA: XBRL DOCUMENT v3.20.1

Major Customers - Additional Information (Detail) - Customer Concentration Risk [Member] - Customer	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Entity Wide Portfolio Carrying Amount, Major Customer [Line Items]
Number of customers	2	2
Sales Revenue, Net [Member] | 2 Customers [Member]
Entity Wide Portfolio Carrying Amount, Major Customer [Line Items]
Customers accounted from total revenue	91.00%	97.00%

X

- Definition

Entity Wide Portfolio Carrying Amount, Major Customer [Line Items]

+ References

No definition available.

+ Details

Name:	omex_EntityWidePortfolioCarryingAmountMajorCustomerLineItems
Namespace Prefix:	omex_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of customers.

+ References

No definition available.

+ Details

Name:	omex_NumberOfCustomers
Namespace Prefix:	omex_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=omex_TwoCustomersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: