XML 56 R41.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions |  | 6 Months Ended
--- | --- | ---
Jul. 10, 2015 | Jun. 30, 2015
Subsequent Event [Line Items] |  |
Aggregate gross proceeds |  | $ 52.8
Preferred Shares Basis |  |
Subsequent Event [Line Items] |  |
Share conversion price |  | $ 0.15
Ordinary Shares Basis |  |
Subsequent Event [Line Items] |  |
Share conversion price |  | $ 1.50
Subsequent Event |  |
Subsequent Event [Line Items] |  |
Aggregate gross proceeds | $ 5.8 |
Subsequent Event | Series A Preferred Stock |  |
Subsequent Event [Line Items] |  |
Shares issued | 38,867,180 |
Subsequent Event | Ordinary Shares |  |
Subsequent Event [Line Items] |  |
Shares issued | 3,886,718 |
Subsequent Event | Preferred Shares Basis |  |
Subsequent Event [Line Items] |  |
Share conversion price | $ 0.15 |
Subsequent Event | Ordinary Shares Basis |  |
Subsequent Event [Line Items] |  |
Share conversion price | $ 1.50 |

X
- Definition Conversion Price Per Share + References No definition available. + Details
Name: | amrn_ConversionPricePerShare
Namespace Prefix: | amrn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfPrivatePlacement
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=amrn_PreferredSharesBasisMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=amrn_OrdinarySharesBasisMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=amrn_OrdinarySharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |