XML 36 R23.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Summarize Activity of the Net Product Revenue Allowance and Reserve Categories (Detail) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2017 | Jun. 30, 2016
Valuation and Qualifying Accounts Disclosure [Line Items] |  |
Beginning balance | $ 27,198 | $ 15,796
Provision related to current period sales | 76,790 | 44,864
Provision related to prior period sales | (1,221) | (553)
Credits/payments made for current period sales | (45,210) | (20,075)
Credits/payments made for prior period sales | (21,623) | (14,187)
Ending balance | 35,934 | 25,845
Trade Allowances |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |
Beginning balance | 3,743 | 4,296
Provision related to current period sales | 15,685 | 10,048
Provision related to prior period sales | (298) | (87)
Credits/payments made for current period sales | (5,496) | (6,415)
Credits/payments made for prior period sales | (3,107) | (4,180)
Ending balance | 10,527 | 3,662
Rebates, Chargebacks and Discounts |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |
Beginning balance | 20,915 | 9,881
Provision related to current period sales | 53,078 | 28,945
Provision related to prior period sales | (841) | (466)
Credits/payments made for current period sales | (34,771) | (10,750)
Credits/payments made for prior period sales | (16,722) | (8,497)
Ending balance | 21,659 | 19,113
Product Returns |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |
Beginning balance | 859 | 535
Provision related to current period sales | 1,259 | 257
Credits/payments made for current period sales | (21) |
Credits/payments made for prior period sales | (24) | (226)
Ending balance | 2,073 | 566
Other Incentives |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |
Beginning balance | 1,681 | 1,084
Provision related to current period sales | 6,768 | 5,614
Provision related to prior period sales | (82) |
Credits/payments made for current period sales | (4,922) | (2,910)
Credits/payments made for prior period sales | (1,770) | (1,284)
Ending balance | $ 1,675 | $ 2,504

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 Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
Name: | us-gaap_ValuationAllowancesAndReservesBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from charges to costs and expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
Name: | us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
Name: | us-gaap_ValuationAllowancesAndReservesDeductions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ValuationAllowancesAndReservesTypeAxis=us-gaap_AllowanceForTradeReceivablesMember
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=us-gaap_AllowanceForSalesReturnsMember
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: |