XML 46 R36.htm IDEA: XBRL DOCUMENT v3.8.0.1

Commitments and Contingencies - Additional Information (Detail) - Sep. 30, 2017 - Further Indication for AMR101 $ in Millions	USD ($)	GBP (£)
Marketing Approval In Europe
Commitments And Contingencies Disclosure [Line Items]
Potential aggregate stock or cash payment	$ 10.0	£ 7,500,000
Potential Marketing Approval 1
Commitments And Contingencies Disclosure [Line Items]
Potential aggregate stock or cash payment	6.7	5,000,000
Potential Marketing Approval 2
Commitments And Contingencies Disclosure [Line Items]
Potential aggregate stock or cash payment	6.7	5,000,000
Maximum
Commitments And Contingencies Disclosure [Line Items]
Potential aggregate stock or cash payment	$ 13.4	£ 10,000,000

X

- Definition

Commitments and contingencies disclosure.

+ References

No definition available.

+ Details

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

X

- Definition

The amount the entity has committed to make for future royalty guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 440
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473578&loc=d3e63223-108013

+ Details

Name:	us-gaap_RoyaltyGuaranteesCommitmentsAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_StatementScenarioAxis=amrn_FurtherIndicationForAMROneZeroOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	amrn_BusinessDevelopmentsAxis=amrn_MarketingApprovalInEuropeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	amrn_BusinessDevelopmentsAxis=amrn_PotentialMarketingApprovalOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	amrn_BusinessDevelopmentsAxis=amrn_PotentialMarketingApprovalTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: