XML 40 R62.htm IDEA: XBRL DOCUMENT v2.4.0.8

Jurisdictions the Company Remains Subject to Tax Examinations (Detail)	12 Months Ended
	Dec. 31, 2013
Minimum | United States - Federal and State
Income Taxes [Line Items]
Tax Years	2010
Minimum | Ireland
Income Taxes [Line Items]
Tax Years	2008
Minimum | United Kingdom
Income Taxes [Line Items]
Tax Years	2012
Maximum | United States - Federal and State
Income Taxes [Line Items]
Tax Years	2013
Maximum | Ireland
Income Taxes [Line Items]
Tax Years	2013
Maximum | United Kingdom
Income Taxes [Line Items]
Tax Years	2013

X

- Details

Name:	amrn_IncomeTaxesLineItems
Namespace Prefix:	amrn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tax year that remains open to examination under enacted tax laws, in CCYY format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

+ Details

Name:	us-gaap_OpenTaxYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration