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Note 4 - Inventories (Tables)
12 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
June 30, 2020
   
June 30, 2019
 
Raw materials
  $
288,422
    $
208,284
 
Supplies and packing materials
   
174,636
     
188,035
 
Finished goods
   
711,545
     
612,343
 
Total inventories
  $
1,174,603
    $
1,008,662