Equity (Details Textual) (USD $)
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1 Months Ended |
3 Months Ended |
0 Months Ended |
1 Months Ended |
12 Months Ended |
0 Months Ended |
12 Months Ended |
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Dec. 31, 2014
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Mar. 31, 2015
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Mar. 31, 2014
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Mar. 09, 2015
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Feb. 18, 2015
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Dec. 31, 2014
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Feb. 11, 2015
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Feb. 18, 2015
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Dec. 31, 2013
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May 08, 2015
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Equity (Textual) |
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Exercise price of warrants |
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$ 6.50us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
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Proceeds from the sale of common stock |
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$ 18,484,998us-gaap_ProceedsFromIssuanceOfCommonStock
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$ 2,871,477us-gaap_ProceedsFromIssuanceOfCommonStock
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Warrants to purchase common stock expected to vest, shares |
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75,000atnm_WarrantsToPurchaseCommonStockExpectedToVest
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Fair value assumptions, expected term |
3 years
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2 years 9 months
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Fair value assumptions, expected volatility rate |
71.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
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[1] |
72.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
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[1] |
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Fair value assumptions, expected dividend rate |
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[2] |
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[2] |
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Unrecognized compensation expense |
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10,800,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
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Stock-based compensation expense |
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2,908,167us-gaap_ShareBasedCompensation
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1,750,926us-gaap_ShareBasedCompensation
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Expense related to common stock granted |
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1,000,000us-gaap_AllocatedShareBasedCompensationExpense
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300,000us-gaap_AllocatedShareBasedCompensationExpense
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Underwriting agreement, description |
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In addition, the Company granted the underwriters a 30-day option to purchase up to an additional 666,666 shares of common stock and warrants to purchase 499,999 shares of common stock solely to cover over-allotments, if any. The underwriter did not exercise the over-allotment option.
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Restricted shares issued |
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203,412us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
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Maximum [Member] |
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Equity (Textual) |
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Share-based Compensation vesting period |
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10 years
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10 years
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Minimum [Member] |
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Equity (Textual) |
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Share-based Compensation vesting period |
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4 years
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4 years
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Consultant [Member] |
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Equity (Textual) |
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Fair value assumptions, expected term |
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10 years
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Warrants [Member] |
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Equity (Textual) |
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Underwritten offering common stock, Shares |
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4,444,444us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementClassOfStockAxis = us-gaap_WarrantMember
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Underwriting discount |
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3,333,333atnm_UnderwritingDiscount / us-gaap_StatementClassOfStockAxis = us-gaap_WarrantMember
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Exercise price of warrants |
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$ 4.50us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_StatementClassOfStockAxis = us-gaap_WarrantMember
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Term of warrants |
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4 years
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Stock-based compensation expense |
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56,516us-gaap_ShareBasedCompensation / us-gaap_StatementClassOfStockAxis = us-gaap_WarrantMember
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58,934us-gaap_ShareBasedCompensation / us-gaap_StatementClassOfStockAxis = us-gaap_WarrantMember
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Warrants exercised by warrant holders |
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1,080,843atnm_WarrantsExercisedByWarrantHolders / us-gaap_StatementClassOfStockAxis = us-gaap_WarrantMember
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Cashless exercise of warrants |
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1,085,618us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementClassOfStockAxis = us-gaap_WarrantMember
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Fair value of warrants |
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3,540,659us-gaap_FairValueAdjustmentOfWarrants / us-gaap_StatementClassOfStockAxis = us-gaap_WarrantMember
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Restricted Stock [Member] |
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Equity (Textual) |
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Restricted stock granted value |
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239,662us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember
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Number of additional stock option granted |
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1,237,250atnm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalGrantsInPeriod / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember
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Warrants to purchase common stock expected to vest, shares |
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164,662atnm_WarrantsToPurchaseCommonStockExpectedToVest / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember
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Restricted stock granted remain outstanding |
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238,973atnm_StockIssuedDuringPeriodRestrictedStockAwardOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember
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Share-based Compensation vesting period |
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6 months
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Restricted shares issued |
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239,662us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockMember
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Public Offering [Member] |
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Equity (Textual) |
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Underwritten offering common stock, Shares |
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4,444,444us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementClassOfStockAxis = us-gaap_IPOMember
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Underwriting discount |
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20,000,000atnm_UnderwritingDiscount / us-gaap_StatementClassOfStockAxis = us-gaap_IPOMember
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Warrants issued to purchase common stock, shares |
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499,999atnm_WarrantsIssuedToPurchaseCommonStock / us-gaap_StatementClassOfStockAxis = us-gaap_IPOMember
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3,333,333atnm_WarrantsIssuedToPurchaseCommonStock / us-gaap_StatementClassOfStockAxis = us-gaap_IPOMember
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Exercise price of warrants |
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$ 4.50us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_StatementClassOfStockAxis = us-gaap_IPOMember
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$ 6.50us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_StatementClassOfStockAxis = us-gaap_IPOMember
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Term of warrants |
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4 years
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Warrants/ Common stock granted |
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666,666us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_StatementClassOfStockAxis = us-gaap_IPOMember
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Cashless exercise of warrants |
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1,085,618us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementClassOfStockAxis = us-gaap_IPOMember
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Stock Options [Member] |
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Equity (Textual) |
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Number of stock option granted |
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536,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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Fair value of warrants determined utilizing the Black-Scholes option pricing model |
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Fair value assumptions, expected discount rate |
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1.83%atnm_FairValueAssumptionsExpectedDiscountRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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1.69%atnm_FairValueAssumptionsExpectedDiscountRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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Fair value assumptions, expected term |
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6 years
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6 years
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6 years
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6 years
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Fair value assumptions, expected volatility rate |
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86.29%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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86.29%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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Fair value assumptions, expected dividend rate |
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0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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Stock-based compensation expense |
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1,000,000us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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159us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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1,000,000us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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38,739us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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Aggregate Intrinsic Value |
4,728,842us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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1,398,935us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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4,728,842us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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Stock Options [Member] | Director [Member] |
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Equity (Textual) |
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Number of stock option granted |
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531,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember
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Share-based Compensation vesting period |
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4 years
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Stock option exercise prices |
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3.58us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember
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Aggregate Intrinsic Value |
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1,400,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember
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1,400,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember
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Stock Options [Member] | Employees [Member] |
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Equity (Textual) |
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Number of stock option granted |
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5,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_TitleOfIndividualAxis = atnm_EmployeesMember
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Share-based Compensation vesting period |
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4 years
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Stock option exercise prices |
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2.91us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_TitleOfIndividualAxis = atnm_EmployeesMember
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Aggregate Intrinsic Value |
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11,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_TitleOfIndividualAxis = atnm_EmployeesMember
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