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v2.4.1.9

Related Party Transactions (Details) (Memorial Sloan Kettering Cancer Center [Member], USD $) | 3 Months Ended
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Mar. 31, 2015
New Drug Application [Member] |
Summary of milestone payments related to related party |
Milestones payments | $ 750,000 atnm_RelatedPartyMilestonesPayment / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = atnm_NewDrugApplicationMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = atnm_MemorialSloanKetteringCancerCenterMember
Receipt of Regulatory Approval From U.S. FDA [Member] |
Summary of milestone payments related to related party |
Milestones payments | $ 1,750,000 atnm_RelatedPartyMilestonesPayment / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = atnm_ReceiptOfRegulatoryApprovalFromUSFdaMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = atnm_MemorialSloanKetteringCancerCenterMember

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- Definition Related party milestones payment. + References No definition available. + Details
Name: | atnm_RelatedPartyMilestonesPayment
Namespace Prefix: | atnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionDueFromToRelatedPartyCurrentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration