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Note 3 - Property and Equipment (Tables)
 6 Months Ended
Dec. 31, 2016
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
December 31,
2016
    
June 30,
2016
  
Machinery and equipment
   $
2,222,670
     $
2,222,670
  
Buildings and structures
    
401,470
      
401,470
  
Computers and office equipment
    
173,313
      
173,313
  
     
2,797,453
      
2,797,453
  
Less accumulated depreciation
    
(2,794,199
 )    
(2,793,194
 )
    $
3,254
    $
4,259