v3.26.1
Note 7 - Commitments and Contingencies (Details Textual)
3 Months Ended
Oct. 02, 2014
Mar. 31, 2026
USD ($)
Mar. 31, 2025
Dec. 31, 2025
USD ($)
Surety Bond [Member] | Asset Pledged as Collateral [Member]        
Cash Equivalent, Money Market Fund, Carrying Value   $ 1,505,537    
Shortage of Raw Materials [Member]        
Loss Contingency, Estimate of Possible Loss       $ 500,000
Contract With the DOE for the Irradiation of Cobalt Targets [Member]        
Contract Term (Year) 10 years      
Other Commitments, Annual Fixed Price, Escalation Percent 5.00%      
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member]        
Number of Major Customers   3 3  
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Theranostics Products [Member]        
Number of Major Customers   1 1  
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Three Customers [Member]        
Concentration Risk, Percentage   26.00% 30.00%  
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Three Customers [Member] | Theranostics Products [Member]        
Concentration Risk, Percentage   17.00% 18.00%