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Document And Entity Information - shares
6 Months Ended
Jun. 30, 2024
Aug. 07, 2024
Cover [Abstract]    
Entity Central Index Key 0000728387  
Entity Registrant Name PERSPECTIVE THERAPEUTICS, INC.  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2024  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2024  
Document Transition Report false  
Entity File Number 001-33407  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 41-1458152  
Entity Address, Address Line One 2401 Elliott Avenue, Suite 320  
Entity Address, City or Town Seattle  
Entity Address, State or Province WA  
Entity Address, Postal Zip Code 98121  
City Area Code 206  
Local Phone Number 676-0900  
Title of 12(b) Security Common Stock, $0.001 par value  
Trading Symbol CATX  
Security Exchange Name NYSEAMER  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   67,427,667