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Other Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Other Revenue (Details) [Line Items]
Revenue recognized	$ 0.8	$ 0.6
Other Revenue [Member]
Other Revenue (Details) [Line Items]
Revenue recognized	$ 0.1

X

- References

No definition available.

+ Details

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

X

- Definition

The amount of revenue recognized.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_RegulatoryLiabilityAxis=us-gaap_DeferredLeaseRevenueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: