Name:	alks_CollaborativeArrangementAdditionalDevelopmentMilestonePaymentToBeEarned
Namespace Prefix:	alks_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the notice period required to be served before the termination of the agreement.

No definition available.

Name:	alks_CollaborativeArrangementEffectiveNoticePeriodRequiredToBeServedForTerminationOfAgreement
Namespace Prefix:	alks_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the amount of milestone payment entitled to be received upon the acceptance of NDA by the FDA, under the collaborative arrangement.

No definition available.

Name:	alks_CollaborativeArrangementMilestonePaymentsEntitledToBeReceivedUponAcceptanceOfNewDrugApplicationByFoodAndDrugAdministration
Namespace Prefix:	alks_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the amount of milestone payment entitled to be received upon the approval of NDA by the FDA, under the collaborative arrangement.

No definition available.

Name:	alks_CollaborativeArrangementMilestonePaymentsEntitledToBeReceivedUponApprovalOfNewDrugApplicationByFoodAndDrugAdministration
Namespace Prefix:	alks_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the amount of milestone payment entitled to be received upon the first commercial sale, under the collaborative arrangement.

No definition available.

Name:	alks_CollaborativeArrangementMilestonePaymentsEntitledToBeReceivedUponFirstCommercialSale
Namespace Prefix:	alks_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the amount of milestone payment entitled to be received upon the initiation of phase 3 clinical trial, under the collaborative arrangement.

No definition available.

Name:	alks_CollaborativeArrangementMilestonePaymentsEntitledToBeReceivedUponInitiationOfPhaseThreeClinicalTrial
Namespace Prefix:	alks_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the threshold for the number of units sold which is used to determine the royalty rate under the collaborative agreement.

No definition available.

Name:	alks_CollaborativeArrangementNumberOfUnitsSoldThresholdForDeterminationOfRoyaltyRate
Namespace Prefix:	alks_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Percentage of total annual requirement of product that can be obtained from second source manufacturer under the collaborative agreement.

No definition available.

Name:	alks_CollaborativeArrangementPercentageOfTotalAnnualRequirementOfProductThatCanBeObtainedFromSecondSourceManufacturer
Namespace Prefix:	alks_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the period after the date of the first commercial sale of the product in a particular country that the agreement will expire.

No definition available.

Name:	alks_CollaborativeArrangementPeriodAfterDateOfFirstCommercialSaleOfProductForExpirationOfAgreement
Namespace Prefix:	alks_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the period for resolving default or breach after the receipt of notice for termination of agreement.

No definition available.

Name:	alks_CollaborativeArrangementPeriodForResolvingDefaultOrBreachAfterReceiptOfNoticeForTerminationOfAgreement
Namespace Prefix:	alks_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents royalty as a percentage of net sales under the collaborative agreements.

No definition available.

Name:	alks_CollaborativeArrangementRoyaltyRate
Namespace Prefix:	alks_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents royalty as a percentage of net sales beyond specified number of units under the collaborative agreement.

No definition available.

Name:	alks_CollaborativeArrangementRoyaltyRateBeyondSpecifiedNumberOfUnits
Namespace Prefix:	alks_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents royalty as a percentage of net sales of specified number of units under the collaborative arrangement.

No definition available.

Name:	alks_CollaborativeArrangementRoyaltyRateForSpecifiedNumberOfUnits
Namespace Prefix:	alks_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents royalty rate upon termination of related agreement.

No definition available.

Name:	alks_CollaborativeArrangementRoyaltyRateUponTerminationOfRelatedAgreement
Namespace Prefix:	alks_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains.

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)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5