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Development, Commercialization and Supply Agreement - Additional Information (Detail) (USD $) | 3 Months Ended | 0 Months Ended
--- | --- | ---
Mar. 31, 2015 | Feb. 26, 2015
License And Collaboration Agreements [Line Items] |  |
Licensing revenue | $ 375,000 us-gaap_LicensesRevenue |
Eddingpharm |  |
License And Collaboration Agreements [Line Items] |  |
Non-refundable up-front received |  | 15,000,000 amrn_NonRefundableUpfrontPaymentsReceived / amrn_BusinessDevelopmentsAxis = amrn_EddingpharmMember
Deferred revenue | 14,600,000 us-gaap_DeferredRevenue / amrn_BusinessDevelopmentsAxis = amrn_EddingpharmMember |
Eddingpharm | Up-front Payment |  |
License And Collaboration Agreements [Line Items] |  |
Licensing revenue | 400,000 us-gaap_LicensesRevenue / amrn_BusinessDevelopmentsAxis = amrn_EddingpharmMember / us-gaap_DeferredRevenueArrangementTypeAxis = us-gaap_UpFrontPaymentArrangementMember |
Eddingpharm | Maximum |  |
License And Collaboration Agreements [Line Items] |  |
Additional upfront payment eligible to receive based on development, regulatory and sales Milestone |  | $ 154,000,000 amrn_EligibleMilestonePayment / amrn_BusinessDevelopmentsAxis = amrn_EddingpharmMember / us-gaap_RangeAxis = us-gaap_MaximumMember

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- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 + Details
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- Definition Revenue earned during the period relating to consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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