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Note 3 - Inventories (Tables)
 3 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
September 30, 2019
    
June 30, 2019
  
Raw materials
   $
1,871,103
     $
1,848,340
  
Finished goods
    
6,582,439
      
6,604,408
  
Inventories, gross    
8,453,542
      
8,452,748
  
Reserve for obsolete inventory
    
(1,594,763
 )    
(1,601,300
 )
Inventories, net
   $
6,858,779
     $
6,851,448