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Note 5 - Inventories (Tables)
6 Months Ended
Jun. 30, 2023
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

June 30, 2023

  

December 31, 2022

 

Radiochemical Products

 $77,018  $23,011 

Cobalt Products

  184,782   189,255 

Nuclear Medicine Products

  439,611   532,527 
  $701,411  $744,793