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Subsequent Event (Details) shares in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2021 USD ($) shares
Subsequent Events [Abstract]
Number of shares | shares	0.2
Net proceed | $	$ 1.8

X

- Definition

The cash inflow from the additional capital contribution to the entity

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	atnm_NumberOfShares
Namespace Prefix:	atnm_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration