v3.26.1
Note 10 - Segment Information - Schedule of Segment Information by Segment (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Sale of product $ 2,671,785 $ 3,655,320 $ 5,050,709 $ 6,894,220  
Depreciation and amortization 107,086 101,037 217,273 198,982  
Net loss (881,997) (160,785) (2,230,083) (273,479)  
Expenditures for segment assets 0 61,495 205,175 190,374  
Segment assets 16,646,173   16,646,173   $ 17,836,632
Operating Segments [Member]          
Sale of product 2,671,785 3,655,320 5,050,709 6,894,220  
Depreciation and amortization 93,141 83,830 189,385 164,016  
Net loss (109,497) 676,560 (242,034) 1,465,063  
Expenditures for segment assets 0 61,495 205,175 167,935  
Segment assets 9,572,340   9,572,340   9,741,395
Operating Segments [Member] | Theranostics Products [Member]          
Sale of product 1,078,127 1,905,402 2,475,409 3,692,456  
Depreciation and amortization 12,436 9,895 24,872 18,104  
Net loss 172,918 1,009,387 579,815 1,886,381  
Expenditures for segment assets 0 4,046 49,481 50,561  
Segment assets 727,561   727,561   1,115,238
Operating Segments [Member] | Cobalt Products [Member]          
Sale of product 497,670 678,015 507,409 750,465  
Depreciation and amortization 18,867 16,360 35,967 32,362  
Net loss 63,273 (97,040) (183,530) (245,266)  
Expenditures for segment assets 0 0 110,023 12,835  
Segment assets 216,076   216,076   260,960
Operating Segments [Member] | Calibration & Reference Products [Member]          
Sale of product 1,055,031 1,013,814 1,937,821 2,340,580  
Depreciation and amortization 32,868 31,480 70,606 61,360  
Net loss (98,799) (38,387) (216,451) 229,176  
Expenditures for segment assets 0 57,449 0 75,663  
Segment assets 2,964,836   2,964,836   2,896,335
Operating Segments [Member] | Medical Device Products [Member]          
Sale of product 40,957 58,089 130,070 110,719  
Depreciation and amortization 0 0 0 0  
Net loss (214,080) (201,305) (377,675) (382,974)  
Expenditures for segment assets 0 0 45,671 28,876  
Segment assets 922,118   922,118   697,503
Operating Segments [Member] | Fluorine Products [Member]          
Sale of product 0 0 0 0  
Depreciation and amortization 28,970 26,095 57,940 52,190  
Net loss (32,809) 3,905 (44,193) (22,254)  
Expenditures for segment assets 0 0 0 0  
Segment assets 4,741,749   4,741,749   4,771,359
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]          
Sale of product 0 0 0 0  
Depreciation and amortization 13,945 17,207 27,888 34,966  
Net loss (772,500) (837,345) (1,988,049) (1,738,542)  
Expenditures for segment assets 0 $ 0 0 $ 22,439  
Segment assets $ 7,073,833   $ 7,073,833   $ 8,095,237