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Note 4 - Inventories (Tables)
6 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
December 31,
   
June 30,
 
   
2019
   
2019
 
Raw materials
  $
275,228
    $
208,284
 
Supplies and packing materials
   
189,781
     
188,035
 
Finished goods
   
754,394
     
612,343
 
Total inventories
  $
1,219,403
    $
1,008,662