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Note 4 - Inventories (Tables)
 12 Months Ended
Jun. 30, 2019
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
2019
   
2018
 
Raw materials
   $
1,848,340
     $
2,717,862
  
Finished goods
    
6,604,408
      
6,057,703
  
     
8,452,748
      
8,775,565
  
Reserve for obsolete inventory
    
(1,601,300
 )    
(2,636,886
 )
Total inventories
   $
6,851,448
     $
6,138,679