Annual report pursuant to Section 13 and 15(d)

Derivatives (Details)

v2.4.1.9
Derivatives (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Schedule of derivative warrant instruments activity    
Beginning balance, Shares subject to warrants 1,968,623atnm_DerivativeWarrantsUnits 5,146,338atnm_DerivativeWarrantsUnits
Transfer from liability to equity classification $ (319,294)atnm_TransferFromLiabilityClassificationToEquityClassification $ (3,177,715)atnm_TransferFromLiabilityClassificationToEquityClassification
Ending Balance, Shares subject to warrants 1,649,329atnm_DerivativeWarrantsUnits 1,968,623atnm_DerivativeWarrantsUnits
Beginning balance, Fair Value 6,707,255us-gaap_DerivativeFairValueOfDerivativeNet 3,574,958us-gaap_DerivativeFairValueOfDerivativeNet
Transfer from liability classification to equity classification, Fair Value (2,203,443)atnm_FairValueOfTransferFromLiabilityClassificationToEquityClassification (1,047,095)atnm_FairValueOfTransferFromLiabilityClassificationToEquityClassification
Change in fair value 2,206,099atnm_ChangeInFairValueOfDerivativeWarrants 4,179,392atnm_ChangeInFairValueOfDerivativeWarrants
Balance, Fair Value $ 6,709,911us-gaap_DerivativeFairValueOfDerivativeNet $ 6,707,255us-gaap_DerivativeFairValueOfDerivativeNet