XML 20 R1.htm IDEA: XBRL DOCUMENT v3.19.2
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2019
Jul. 29, 2019
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Trading Symbol AMRN  
Entity Registrant Name AMARIN CORP PLC\UK  
Entity Central Index Key 0000897448  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity File Number 000-21392  
Entity Address, Address Line One 77 Sir John Rogerson’s Quay  
Entity Address, Address Line Two Block C  
Entity Address, Address Line Three Grand Canal Docklands  
Entity Address, City or Town Dublin  
Entity Address, Postal Zip Code 2  
Entity Address, Country Ireland  
City Area Code 353 (0) 1  
Local Phone Number 6699 020  
Former Address    
Document Information [Line Items]    
Entity Address, Address Line One 2 Pembroke House  
Entity Address, Address Line Two Upper Pembroke Street 28-32  
Entity Address, City or Town Dublin  
Entity Address, Postal Zip Code 2  
Entity Address, Country Ireland  
American Depositary Shares    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   357,009,987
Ordinary Shares    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   204,491