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Note 4 - Inventories (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

March 31, 2023

  

December 31, 2022

 
         

Dental finished goods

 $1,541,290  $1,315,263 

Medical finished goods

  326,686   334,124 

Component parts and other materials

  170,322   142,948 

Total inventories

 $2,038,298  $1,792,335