XML 86 R52.htm IDEA: XBRL DOCUMENT
v3.22.4

Equity - Common Stock - Additional Information (Detail) - Jul. 13, 2022 - Food and Drug Administration € in Millions | EUR (€) shares | $ / shares
--- | --- | ---
Stockholders Equity Note [Line Items] |  |
Milestone payment | € | € 7.5 |
Stock issuance of shares | shares | 5,817,942 |
Sale of stock per share | $ / shares |  | $ 1.41

X
- Definition Milestone payment. + References No definition available. + Details
Name: | amrn_MilestonePayment
Namespace Prefix: | amrn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Stockholders Equity Note [Line Items] + References No definition available. + Details
Name: | amrn_StockholdersEquityNoteLineItems
Namespace Prefix: | amrn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RegulatoryAgencyAxis=amrn_FoodAndDrugAdministrationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |