Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions (Details Textual)

v2.4.1.9
Related Party Transactions (Details Textual) (USD $)
6 Months Ended 0 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended
Jun. 30, 2014
Dec. 09, 2013
Mar. 31, 2015
Dec. 31, 2014
Feb. 11, 2015
Related Party Transactions (Textual)          
Common stock, par value     $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare  
Gross proceeds received in Offering $ 12,525,000us-gaap_ProceedsFromIssuanceInitialPublicOffering        
Placement agent [Member]          
Related Party Transactions (Textual)          
Placement agent services fees       75,000atnm_PlacementAgentServicesFees
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
 
Description of receivables of placement agent for services   Agreement entered in on December 9, 2013 had similar terms as the 2012 agreement, including a cash fee equal to 10% of the gross proceeds raised, a non-accountable expense reimbursement equal to 2% of the gross proceeds raised and warrants to purchase shares of the Company's Common Stock      
Description of warrants receivables by placement   Warrants to purchase shares of the Company's Common Stock in an amount equal to 10% of the shares of common stock issued or issuable      
Monthly fee for financial advisory services   25,000atnm_PeriodicFeeForFinancialAdvisoryServices
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
     
Repayment of amount paid to placement agent     25,000us-gaap_RepaymentsOfDebt
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
25,000us-gaap_RepaymentsOfDebt
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
 
IPO [Member]          
Related Party Transactions (Textual)          
Other expenses 125,000us-gaap_OtherExpenses
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
       
Amount paid to placement agent         1,400,000atnm_AmountPaidToPlacementAgent
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
Underwritten offering common stock, Shares         4,444,444us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
Auditor Fees 72,000atnm_AuditorFees
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
       
Common stock, par value $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
       
Underwriting discount         20,000,000atnm_UnderwritingDiscount
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
Gross proceeds received in Offering 11,451,250us-gaap_ProceedsFromIssuanceInitialPublicOffering
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
      18,500,000us-gaap_ProceedsFromIssuanceInitialPublicOffering
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
MSKCC [Member]          
Related Party Transactions (Textual)          
Maintenance fees     145,000atnm_MaintenanceFeesAndResearchPayments
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= atnm_MemorialSloanKetteringCancerCenterMember
189,537atnm_MaintenanceFeesAndResearchPayments
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= atnm_MemorialSloanKetteringCancerCenterMember
 
Royalty description     Under the agreement, the Company shall pay to MSKCC on a country-by-country basis a royalty of 2% of net sales of all licensed products until the later of: (1) 10 years from the first commercial sale, or (2) when the patents expire.    
MSKCC [Member] | Clinical Trial Agreement [Member]          
Related Party Transactions (Textual)          
Maintenance fees     $ 282,912atnm_MaintenanceFeesAndResearchPayments
/ atnm_AgreementAxis
= atnm_ClinicalTrialAgreementMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= atnm_MemorialSloanKetteringCancerCenterMember
$ 189,537atnm_MaintenanceFeesAndResearchPayments
/ atnm_AgreementAxis
= atnm_ClinicalTrialAgreementMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= atnm_MemorialSloanKetteringCancerCenterMember