Name:	atnm_AggregateFairValue
Namespace Prefix:	atnm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Exercise price per share or per unit of warrants or rights outstanding.

No definition available.

Name:	atnm_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRight
Namespace Prefix:	atnm_
Data Type:	dtr:perShareItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

Name:	atnm_CompensationExpenseRelatedToStockOptions
Namespace Prefix:	atnm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

Name:	atnm_EquityDetailsLineItems
Namespace Prefix:	atnm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Stock option, Description

No definition available.

Name:	atnm_StockOptionDescription
Namespace Prefix:	atnm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Stock option term.

No definition available.

Name:	atnm_StockOptionTerm
Namespace Prefix:	atnm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Unrecognized compensation expense.

No definition available.

Name:	atnm_UnrecognizedCompensationExpense
Namespace Prefix:	atnm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Vesting period of stock option.

No definition available.

Name:	atnm_VestingPeriodOfStockOption
Namespace Prefix:	atnm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Weighted average term

No definition available.

Name:	atnm_WeightedAverageTerm
Namespace Prefix:	atnm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The cash inflow from the additional capital contribution to the entity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585

Name:	us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

Name:	us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Cash received on stock transaction after deduction of issuance costs.

No definition available.

Name:	us-gaap_SaleOfStockConsiderationReceivedOnTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

No definition available.

Name:	us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Net number of share options (or share units) granted during the period.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(01)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Name:	atnm_AgreementAxis=atnm_CapitalOnDemandSalesAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_StockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: