v2.4.0.8
Document and Entity Information (USD $)
12 Months Ended
Dec. 31, 2013
Jun. 30, 2013
Feb. 20, 2014
Ordinary Shares
Feb. 20, 2014
American Depository Shares
Document Information [Line Items]        
Document Type 10-K      
Amendment Flag false      
Document Period End Date Dec. 31, 2013      
Document Fiscal Year Focus 2013      
Document Fiscal Period Focus FY      
Trading Symbol AMRN      
Entity Registrant Name AMARIN CORP PLC\UK      
Entity Central Index Key 0000897448      
Current Fiscal Year End Date --12-31      
Entity Well-known Seasoned Issuer Yes      
Entity Current Reporting Status Yes      
Entity Voluntary Filers No      
Entity Filer Category Large Accelerated Filer      
Entity Public Float   $ 785,000,000    
Entity Common Stock, Shares Outstanding     465,853 172,440,210