Subsequent Events (Details) (USD $)
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0 Months Ended |
3 Months Ended |
6 Months Ended |
12 Months Ended |
1 Months Ended |
0 Months Ended |
Jul. 10, 2014
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Apr. 28, 2014
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Jun. 30, 2014
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2014
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Feb. 18, 2015
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Feb. 11, 2015
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Subsequent Events (Textual) |
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Issuance during underwritten offering |
157,123us-gaap_StockIssuedDuringPeriodSharesNewIssues
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500us-gaap_StockIssuedDuringPeriodSharesNewIssues
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Net proceeds from the public offering |
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$ 12,525,000us-gaap_ProceedsFromIssuanceInitialPublicOffering
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Stock Options [Member] |
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Subsequent Events (Textual) |
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Number of stock option granted |
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1,338,100us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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787,450us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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Weighted Average Exercise Price, granted |
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$ 8.86us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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$ 6.62us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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Fair value of stock option |
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8,700,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1 / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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3,700,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1 / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
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Stock option contractual term |
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8 years 4 months 2 days
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8 years 10 months 28 days
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Subsequent Event [Member] |
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Subsequent Events (Textual) |
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Common shares to for cashless exercise of warrants |
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891,131us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
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Shares issued to consultants |
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164,662us-gaap_StockIssuedDuringPeriodSharesIssuedForServices / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
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Shares issued to employee |
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10,000us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
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Subsequent Event [Member] | Stock Options [Member] |
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Subsequent Events (Textual) |
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Number of stock option granted |
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456,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
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Weighted Average Exercise Price, granted |
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$ 3.58us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
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Fair value of stock option |
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1,000,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1 / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
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Stock option contractual term |
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10 years
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Stock option vesting period |
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4 years
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Fair value assumption method |
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Black-Scholes option-pricing model
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Fair value assumptions, discount rate |
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1.66%atnm_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDiscountRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
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Fair value assumptions, expected life |
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6 years
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Fair value assumptions, expected volatility rate |
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82.47%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
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Fair value assumptions, expected dividend rate |
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0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
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Subsequent Event [Member] | Public Offering [Member] |
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Subsequent Events (Textual) |
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Issuance during underwritten offering |
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3,333,333us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
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Price per share |
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$ 4.50us-gaap_SharePrice / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
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Term of warrants |
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4 years
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Exercise price of warrants |
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$ 6.5us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
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Net proceeds from the public offering |
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$ 18,500,000us-gaap_ProceedsFromIssuanceInitialPublicOffering / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
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Subsequent Event [Member] | Public Offering [Member] | Warrants [Member] |
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Subsequent Events (Textual) |
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Stock issued to cover over allotment |
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499,999atnm_StockIssuedDuringPeriodOverAllotment / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
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Issuance during underwritten offering |
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4,444,444us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
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Subsequent Event [Member] | Public Offering [Member] | Common Stock [Member] |
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Subsequent Events (Textual) |
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Stock issued to cover over allotment |
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666,666atnm_StockIssuedDuringPeriodOverAllotment / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
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Issuance during underwritten offering |
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4,444,444us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
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