XML 99 R71.htm IDEA: XBRL DOCUMENT
v3.20.1

Accrued Expenses - Additional Information (Detail) - USD ($) | Dec. 31, 2019 | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Accrued incentive awards | $ 200,000 |  | $ 2,600,000
Earnest Money Deposit | $ (450,000) |  |
Greg Stemm Our Past Chairman [Member] |  |  |
Earnest Money Deposit |  | $ 450,000 |

X
- Definition earnest money deposit + References No definition available. + Details
Name: | omex_EarnestMoneyDeposit
Namespace Prefix: | omex_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of obligations incurred and payable for incentive compensation awarded to employees and directors or earned by them based on the terms of one or more relevant arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_AccruedBonusesCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=omex_GregStemmOurPastChairmanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |