XML 66 R47.htm IDEA: XBRL DOCUMENT
v3.22.2

Revenue Recognition - Summarize Activity of the Net Product Revenue Allowance and Reserve Categories (Detail) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2022 | Jun. 30, 2021
Valuation And Qualifying Accounts Disclosure [Line Items] |  |
Beginning balance | $ 280,693 | $ 190,827
Provision related to current period sales | 398,246 | 409,766
Provision related to prior period sales | 107 | (854)
Credits/payments made for current period sales | (271,693) | (212,807)
Credits/payments made for prior period sales | (214,794) | (168,242)
Ending balance | 192,559 | 218,690
Trade Allowances |  |
Valuation And Qualifying Accounts Disclosure [Line Items] |  |
Beginning balance | 86,636 | 36,242
Provision related to current period sales | 48,472 | 60,487
Credits/payments made for current period sales | (20,724) | (19,874)
Credits/payments made for prior period sales | (83,398) | (34,511)
Ending balance | 30,986 | 42,344
Rebates, Chargebacks and Discounts |  |
Valuation And Qualifying Accounts Disclosure [Line Items] |  |
Beginning balance | 184,726 | 141,201
Provision related to current period sales | 333,126 | 321,400
Provision related to prior period sales | 107 | (854)
Credits/payments made for current period sales | (237,768) | (170,389)
Credits/payments made for prior period sales | (128,152) | (127,379)
Ending balance | 152,039 | 163,979
Product Returns |  |
Valuation And Qualifying Accounts Disclosure [Line Items] |  |
Beginning balance | 8,090 | 7,797
Provision related to current period sales | 1,178 | 1,750
Credits/payments made for prior period sales | (614) | (763)
Ending balance | 8,654 | 8,784
Other Incentives |  |
Valuation And Qualifying Accounts Disclosure [Line Items] |  |
Beginning balance | 1,241 | 5,587
Provision related to current period sales | 15,470 | 26,129
Credits/payments made for current period sales | (13,201) | (22,544)
Credits/payments made for prior period sales | (2,630) | (5,589)
Ending balance | $ 880 | $ 3,583

X
- Definition Credits/payments made for prior period sales. + References No definition available. + Details
Name: | amrn_CreditsPaymentsMadeForPriorPeriodSales
Namespace Prefix: | amrn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Provision related to prior period sales. + References No definition available. + Details
Name: | amrn_ProvisionRelatedToPriorPeriodSales
Namespace Prefix: | amrn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Valuation allowances provisions and reserves balance net. + References No definition available. + Details
Name: | amrn_ValuationAllowancesProvisionsAndReservesBalanceNet
Namespace Prefix: | amrn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | srt_ValuationAndQualifyingAccountsDisclosureLineItems
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column C)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
Name: | us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of decrease in valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column D)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
Name: | us-gaap_ValuationAllowancesAndReservesDeductions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_ValuationAllowancesAndReservesTypeAxis=us-gaap_AllowanceForCreditLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationAllowancesAndReservesTypeAxis=amrn_RebatesChargebacksAndDiscountsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationAllowancesAndReservesTypeAxis=amrn_ProductReturnsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationAllowancesAndReservesTypeAxis=amrn_OtherIncentiveProgramsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |