Annual report pursuant to Section 13 and 15(d)

Equity (Details Textual)

v2.4.1.9
Equity (Details Textual) (USD $)
0 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 9 Months Ended 1 Months Ended
Jul. 10, 2014
Mar. 24, 2014
Dec. 27, 2013
Apr. 28, 2014
Jun. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jan. 31, 2014
Equity (Textual)                  
Fair value assumptions, risk free interest rate           1.10%us-gaap_FairValueAssumptionsRiskFreeInterestRate [1] 1.27%us-gaap_FairValueAssumptionsRiskFreeInterestRate [1]    
Fair value assumptions, expected volatility rate           71.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate [2] 73.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate [2]    
Fair value assumptions, expected term           3 years 6 months    
Fair value assumptions, expected dividend rate              [3]    [3]    
Issuance of common stock from exercise of options           $ 275,153us-gaap_ProceedsFromStockOptionsExercised $ 13,053us-gaap_ProceedsFromStockOptionsExercised    
Expense related to common stock granted           2,400,000us-gaap_AllocatedShareBasedCompensationExpense 300,000us-gaap_AllocatedShareBasedCompensationExpense    
Unrecognized compensation expense           10,213,905us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized 3,999,368us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized    
Net proceeds from the public offering         12,525,000us-gaap_ProceedsFromIssuanceInitialPublicOffering        
Common stock, par value           $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare    
Common stock issued, shares 157,123us-gaap_StockIssuedDuringPeriodSharesNewIssues     500us-gaap_StockIssuedDuringPeriodSharesNewIssues          
Proceeds from common stock issued     3,325,860us-gaap_StockIssuedDuringPeriodValueNewIssues 6,000us-gaap_StockIssuedDuringPeriodValueNewIssues          
Underwriting discount     2,883,257atnm_UnderwritingDiscount            
Underwriting agreement description    

Investors agreed to purchase (i) an aggregate of 554,310 shares (the “Shares”) of common stock at $6.00 per share and (ii) five-year warrants to purchase an aggregate of 138,577 shares of common stock at an exercise price of $9.00 per share. The Company received $3,325,860 in gross proceeds from the sale of securities.

           
Fair value adjustment           2,100,000us-gaap_EquityFairValueAdjustment      
Registration statement description   This Registration Statement contained two prospectuses: (i) a base prospectus which covers the offering, issuance and sale by the Company of up to $200,000,000 of its common stock, preferred stock, warrants and/or units; and (ii) a sales agreement prospectus covering the offering, issuance and sale by us of up to a maximum aggregate offering price of $75,000,000 of its common stock that may be issued and sold under a sales agreement (the "Sales Agreement") with MLV & Co. LLC ("MLV") dated March 24, 2014.              
Maximum offering price   75,000,000atnm_MaximumOfferingPrice              
Aggregate offering amount of securities sold to investors   The Company will pay MLV in cash, upon the sale of common stock pursuant to the Sales Agreement, an amount equal to 3.0% of the gross proceeds from the sale of common stock. On April 28, 2014, the Company issued 500 shares and received net proceeds of $6,000 under the Sales Agreement with MLV.              
Proceeds from the sale of common stock           15,435,305us-gaap_ProceedsFromIssuanceOfCommonStock 2,883,257us-gaap_ProceedsFromIssuanceOfCommonStock    
Investor [Member]                  
Equity (Textual)                  
Warrants issued to purchase common stock, shares           137,952atnm_WarrantsIssuedToPurchaseCommonStock
/ us-gaap_TitleOfIndividualAxis
= us-gaap_InvestorMember
     
Consultant [Member]                  
Equity (Textual)                  
Fair value assumptions, expected term           10 years      
Warrants issued to purchase common stock, shares           285,000atnm_WarrantsIssuedToPurchaseCommonStock
/ us-gaap_TitleOfIndividualAxis
= atnm_ConsultantMember
     
Consultant [Member] | Minimum [Member]                  
Equity (Textual)                  
Exercise price of warrants           $ 5.55us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_TitleOfIndividualAxis
= atnm_ConsultantMember
     
Consultant [Member] | Maximum [Member]                  
Equity (Textual)                  
Exercise price of warrants           $ 11.66us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_TitleOfIndividualAxis
= atnm_ConsultantMember
     
2013 Stock Plan [Member]                  
Equity (Textual)                  
Number of additional shares authorized             5,750,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_PlanNameAxis
= atnm_TwoThousandThirteenStockPlanMember
   
2013 Stock Plan [Member] | Employees, consultants and board members [Member]                  
Equity (Textual)                  
Number of stock option granted               2,750,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= atnm_TwoThousandThirteenStockPlanMember
/ us-gaap_TitleOfIndividualAxis
= atnm_EmployeesDirectorsAndConsultantsMember
 
Award expiration date               Sep. 09, 2023  
2013 Equity Incentive Plan [Member]                  
Equity (Textual)                  
Number of additional shares authorized             1,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_PlanNameAxis
= atnm_TwoThousandThirteenEquityIncentivePlanMember
   
2013 Equity Incentive Plan [Member] | Employees, consultants and board members [Member]                  
Equity (Textual)                  
Number of stock option granted               450,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= atnm_TwoThousandThirteenEquityIncentivePlanMember
/ us-gaap_TitleOfIndividualAxis
= atnm_EmployeesDirectorsAndConsultantsMember
 
Award expiration date               Sep. 09, 2023  
Placement agent [Member]                  
Equity (Textual)                  
Warrants issued to purchase common stock, shares           68,976atnm_WarrantsIssuedToPurchaseCommonStock
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
69,289atnm_WarrantsIssuedToPurchaseCommonStock
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
   
Private Placement [Member]                  
Equity (Textual)                  
Issuance of common stock from exercise of options                 2,873,557us-gaap_ProceedsFromStockOptionsExercised
/ us-gaap_StatementClassOfStockAxis
= us-gaap_PrivatePlacementMember
Proceeds from issuance of warrants                 3,300,000us-gaap_ProceedsFromIssuanceOfWarrants
/ us-gaap_StatementClassOfStockAxis
= us-gaap_PrivatePlacementMember
Placement agent cash fees                 395,000atnm_PlacementAgentCashFees
/ us-gaap_StatementClassOfStockAxis
= us-gaap_PrivatePlacementMember
Placement agent attorney fees                 40,000atnm_PlacementAgentAttorneyFees
/ us-gaap_StatementClassOfStockAxis
= us-gaap_PrivatePlacementMember
Warrant [Member]                  
Equity (Textual)                  
Fair value of warrants determined utilizing the Black-Scholes option pricing model                 600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
Fair value assumptions, expected volatility rate             91.56%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
   
Fair value assumptions, expected term           5 years 5 years    
Fair value assumptions, expected dividend rate           0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
   
Warrants issued to purchase common stock, shares             122,000atnm_WarrantsIssuedToPurchaseCommonStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
   
Expense related to common stock granted           100,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
200,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
0us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
 
Unrecognized compensation expense           1,495,128us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
226,049us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
   
Price per share                 $ 9.00us-gaap_SaleOfStockPricePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
Warrants exercised by warrant holders           2,501,993atnm_WarrantsExercisedByWarrantHolders
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
2,403,429atnm_WarrantsExercisedByWarrantHolders
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
   
Warrants to purchase common stock shares             72,000atnm_WarrantsToPurchaseCommonStockVestedShares
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
   
Warrant to purchase common stock vested, value             177,313atnm_WarrantToPurchaseCommonStockVested
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
   
Warrants to purchase common stock expected to vest, shares             50,000atnm_WarrantsToPurchaseCommonStockExpectedToVest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
   
Warrants to purchase common stock expected to vest, value             235,737atnm_WarrantsToPurchaseCommonStockVestedValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
   
Warrant [Member] | Minimum [Member]                  
Equity (Textual)                  
Exercise price of warrants             $ 3.60us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
   
Fair value assumptions, expected volatility rate           82.90%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
     
Fair value assumptions, expected discount rate           1.56%atnm_FairValueAssumptionsExpectedDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
1.36%atnm_FairValueAssumptionsExpectedDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
   
Term of warrants             7 years    
Warrant [Member] | Maximum [Member]                  
Equity (Textual)                  
Exercise price of warrants             $ 6.70us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
   
Fair value assumptions, expected volatility rate           87.80%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
     
Fair value assumptions, expected discount rate           1.66%atnm_FairValueAssumptionsExpectedDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
1.55%atnm_FairValueAssumptionsExpectedDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_WarrantMember
   
Term of warrants             10 years    
Common Stock [Member]                  
Equity (Textual)                  
Common stock issued, shares           2,336,658us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
2,336,988us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
   
Proceeds from common stock issued           159,994us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
     
Proceeds from the sale of common stock             3,500,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
   
Common Stock [Member] | Placement agent [Member]                  
Equity (Textual)                  
Fair value of warrants determined utilizing the Black-Scholes option pricing model     400,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
          200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
Exercise price of warrants                 $ 6.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
Fair value assumptions, risk free interest rate     0.07%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
           
Fair value assumptions, expected volatility rate     84.06%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
           
Fair value assumptions, expected term     5 years            
Fair value assumptions, expected dividend rate     0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
           
Common Stock [Member] | Laidlaw and Co [Member] | Placement agent [Member]                  
Equity (Textual)                  
Fair value of warrants determined utilizing the Black-Scholes option pricing model                 300,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
/ us-gaap_TypeOfArrangementAxis
= atnm_LaidlawAndCoMember
Exercise price of warrants                 $ 9.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
/ us-gaap_TypeOfArrangementAxis
= atnm_LaidlawAndCoMember
Fair value assumptions, risk free interest rate                 1.64%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
/ us-gaap_TypeOfArrangementAxis
= atnm_LaidlawAndCoMember
Fair value assumptions, expected volatility rate                 88.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
/ us-gaap_TypeOfArrangementAxis
= atnm_LaidlawAndCoMember
Fair value assumptions, expected term                 5 years
Fair value assumptions, expected dividend rate                 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
/ us-gaap_TypeOfArrangementAxis
= atnm_LaidlawAndCoMember
Warrants issued to purchase common stock, shares                 68,976atnm_WarrantsIssuedToPurchaseCommonStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= atnm_PlacementAgentMember
/ us-gaap_TypeOfArrangementAxis
= atnm_LaidlawAndCoMember
Restricted Stock [Member] | Employees, consultants and board members [Member]                  
Equity (Textual)                  
Number of shares of restricted stock, granted           633,041us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockMember
/ us-gaap_TitleOfIndividualAxis
= atnm_EmployeesDirectorsAndConsultantsMember
312,500us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockMember
/ us-gaap_TitleOfIndividualAxis
= atnm_EmployeesDirectorsAndConsultantsMember
   
Restricted stock granted value           4,827,516us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockMember
/ us-gaap_TitleOfIndividualAxis
= atnm_EmployeesDirectorsAndConsultantsMember
678,000us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockMember
/ us-gaap_TitleOfIndividualAxis
= atnm_EmployeesDirectorsAndConsultantsMember
   
Restricted stock granted not been issued           202,723atnm_StockIssuedDuringPeriodRestrictedStockAwardNotIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockMember
/ us-gaap_TitleOfIndividualAxis
= atnm_EmployeesDirectorsAndConsultantsMember
     
Number of stock option cancelled           50,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockMember
/ us-gaap_TitleOfIndividualAxis
= atnm_EmployeesDirectorsAndConsultantsMember
     
Description restricted stock           Of the total shares of restricted stock granted, 20,000 shares vest 3 months from the grant date, 30,374 shares vest 1 year from the grant date, 30,000 shares have a vesting period of 2 years, 202,497 shares have a vesting period of 4 years and 350,000 shares vest at the date of grant. 80,000 shares of restricted stock vest 1 year from the grant date, 100,000 shares have a vesting period of 24 months. The remaining restricted shares granted are performance based and vest over time.    
Public Offering [Member]                  
Equity (Textual)                  
Number of additional stock option granted 157,123atnm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalGrantsInPeriod
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
               
Issuance of common stock from exercise of options 1,200,000us-gaap_ProceedsFromStockOptionsExercised
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
               
Net proceeds from the public offering 13,700,000us-gaap_ProceedsFromIssuanceInitialPublicOffering
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
      11,451,250us-gaap_ProceedsFromIssuanceInitialPublicOffering
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
       
Price per share 7.50us-gaap_SaleOfStockPricePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
      $ 7.50us-gaap_SaleOfStockPricePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
       
Common stock, par value         $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
       
Common stock issued, shares 1,827,123us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
      1,670,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
       
Proceeds from common stock issued 13,700,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
      12,525,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
       
Underwriting discount 12,555,748atnm_UnderwritingDiscount
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
      876,750atnm_UnderwritingDiscount
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
       
Underwriting agreement description         Under the terms of the underwriting agreement entered into with Canaccord Genuity Inc. as representative (the "Representative") of the several underwriters (collectively, the "Underwriters"), the Company also granted the Underwriters a 30-day option to purchase up to an additional 250,000 shares of common stock to cover over-allotments, if any, at the offering price.        
Other offering expenses         125,000us-gaap_OtherExpenses
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
       
Auditor fees         72,000us-gaap_ProfessionalFees
/ us-gaap_StatementClassOfStockAxis
= us-gaap_IPOMember
       
Stock Option Plan [Member]                  
Equity (Textual)                  
Fair value of warrants determined utilizing the Black-Scholes option pricing model                   
Fair value assumptions, expected term           6 years 6 years    
Fair value assumptions, expected dividend rate           0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
   
Number of stock option granted           1,338,100us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
787,450us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
   
Number of stock option cancelled             (1,115,550)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
   
Share-based compensation term           10 years 10 years    
Share-based Compensation vesting period           4 years 4 years    
Fair value of stock option           8,700,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
3,700,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
   
Stock option exercise prices           $ 0.95us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
$ 0.78us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
   
Issuance of common stock from exercise of options           $ 275,153us-gaap_ProceedsFromStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
     
Number of option exercised           (310,400)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
(16,650)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
   
Warrants/ Common stock granted             787,450us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
   
Stock Option Plan [Member] | Minimum [Member]                  
Equity (Textual)                  
Exercise price of warrants             $ 3.60us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Fair value assumptions, expected volatility rate           82.47%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
83.32%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Fair value assumptions, expected discount rate           1.77%atnm_FairValueAssumptionsExpectedDiscountRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
1.36%atnm_FairValueAssumptionsExpectedDiscountRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Stock option exercise prices           $ 0.78us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
     
Stock Option Plan [Member] | Maximum [Member]                  
Equity (Textual)                  
Exercise price of warrants             $ 6.70us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Fair value assumptions, expected volatility rate           87.76%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
98.45%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Fair value assumptions, expected discount rate           2.07%atnm_FairValueAssumptionsExpectedDiscountRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
1.55%atnm_FairValueAssumptionsExpectedDiscountRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Stock option exercise prices           $ 11.95us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
     
[1] The risk-free interest rate was determined by management using the Treasury Bill as of the respective measurement date.
[2] Because the Company does not have adequate trading history to determine its historical trading volatility, the volatility factor was estimated by management using the historical volatilities of comparable companies in the same industry and region.
[3] Management determined the dividend yield to be 0% based upon its expectation that it will not pay dividends for the foreseeable future.