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Cover Page - shares
 9 Months Ended
Sep. 30, 2020
Oct. 31, 2020
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2020  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q3  
Entity Registrant Name ODYSSEY MARINE EXPLORATION INC  
Entity Central Index Key 0000798528  
Entity Filer Category Non-accelerated Filer  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Shell Company false  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Address, State or Province FL  
Trading Symbol OMEX  
Title of 12(b) Security Common Stock  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   12,208,101