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Note E - Inventories (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
December 31
   
2017
 
2016
Inventories consist of the following:
           
Dental finished goods   $
2,846,272
  $
3,832,275
Medical finished goods, net     
475,285
   
735,061
Component parts and other materials
   
57,652
   
35,383
Total
  $
3,379,209
  $
4,602,719