Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

Document And Entity Information - shares
6 Months Ended
Jun. 30, 2023
Aug. 14, 2023
Document Information Line Items    
Trading Symbol ATNM  
Document Type 10-Q  
Current Fiscal Year End Date --12-31  
Entity Common Stock, Shares Outstanding   26,997,587
Amendment Flag false  
Entity Central Index Key 0001388320  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Document Period End Date Jun. 30, 2023  
Document Fiscal Year Focus 2023  
Document Fiscal Period Focus Q2  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Document Quarterly Report true  
Document Transition Report false  
Entity File Number 001-36374  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 74-2963609  
City Area Code (646)  
Local Phone Number 677-3870  
Entity Address, Address Line One 275 Madison Avenue, 7th Fl  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10016  
Title of 12(b) Security Common stock, par value $0.001  
Security Exchange Name NYSE  
Entity Interactive Data Current Yes