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Note 3 - Property and Equipment (Tables)
12 Months Ended
Jun. 30, 2018
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
June 30,
2018
   
June 30,
2017
 
Machinery and equipment
  $
2,222,670
    $
2,222,670
 
Buildings and structures
   
401,470
     
401,470
 
Computers and office equipment
   
171,613
     
171,613
 
     
2,795,753
     
2,795,753
 
Less accumulated depreciation
   
(2,794,305
)    
(2,792,561
)
    $
1,448
    $
3,192