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Derivatives (Details Textual) (USD $)
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1 Months Ended | 3 Months Ended | ||||
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Dec. 31, 2014
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Mar. 31, 2015
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| Derivatives (Textual) | ||||||
| Expected dividend yield | [1] | [1] | ||||
| Warrant [Member] | ||||||
| Derivatives (Textual) | ||||||
| Warrants exercised |
1,021,369us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised / us-gaap_DerivativeByNatureAxis = us-gaap_WarrantMember |
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| Derivative warrants |
21,960atnm_NumberOfDerivativeWarrants / us-gaap_DerivativeByNatureAxis = us-gaap_WarrantMember |
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| Fair value of warrants |
48,691us-gaap_FairValueAdjustmentOfWarrants / us-gaap_DerivativeByNatureAxis = us-gaap_WarrantMember |
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Number of derivative warrants. No definition available.
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| X | ||||||||||
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- Definition
Amount of expense (income) related to adjustment to fair value of warrant liability. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of non-option equity instruments exercised by participants. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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