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Note 4 - Inventory
3 Months Ended
Sep. 30, 2018
Notes to Financial Statements  
Inventory Disclosure [Text Block]
4
.
Inventory
 
Inventory consists of the following:
 
   
September 30,
   
June 30,
 
   
2018
   
2018
 
                 
Laboratory testing supplies
  $
407,878
    $
453,129
 
Total inventory
  $
407,878
    $
453,129