v3.26.1
Note 10 - Segment Information - Schedule of Segment Information by Segment (Details) - USD ($)
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Sale of product $ 2,378,924 $ 3,238,900  
Depreciation and amortization 110,188 97,945  
Net loss (1,348,086) (112,694)  
Expenditures for segment assets 205,175 128,881  
Segment assets 17,187,873   $ 17,836,632
Operating Segments [Member]      
Sale of product 2,378,924 3,238,900  
Depreciation and amortization 96,244 80,186  
Net loss (132,535) 788,503  
Expenditures for segment assets 205,175 106,440  
Segment assets 9,712,869   9,741,395
Operating Segments [Member] | Theranostics Products [Member]      
Sale of product 1,397,282 1,787,054  
Depreciation and amortization 12,436 8,209  
Net loss 406,898 876,994  
Expenditures for segment assets 49,481 46,515  
Segment assets 991,032   1,115,238
Operating Segments [Member] | Cobalt Products [Member]      
Sale of product 9,739 72,450  
Depreciation and amortization 17,100 16,002  
Net loss (246,803) (148,226)  
Expenditures for segment assets 110,023 12,835  
Segment assets 316,024   260,960
Operating Segments [Member] | Calibration & Reference Products [Member]      
Sale of product 882,790 1,326,766  
Depreciation and amortization 37,738 29,880  
Net loss (117,652) 267,563  
Expenditures for segment assets 0 18,214  
Segment assets 2,843,051   2,896,335
Operating Segments [Member] | Medical Device Products [Member]      
Sale of product 89,113 52,630  
Depreciation and amortization 0 0  
Net loss (163,594) (181,669)  
Expenditures for segment assets 45,671 28,876  
Segment assets 792,043   697,503
Operating Segments [Member] | Fluorine Products [Member]      
Sale of product 0 0  
Depreciation and amortization 28,970 26,095  
Net loss (11,384) (26,159)  
Expenditures for segment assets 0 0  
Segment assets 4,770,719   4,771,359
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]      
Sale of product 0 0  
Depreciation and amortization 13,944 17,759  
Net loss (1,215,551) (901,197)  
Expenditures for segment assets 0 $ 22,441  
Segment assets $ 7,475,004   $ 8,095,237