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Note 5 - Property and Equipment (Tables)
12 Months Ended
Jun. 30, 2017
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
June 30, 2017
   
June 30, 2016
 
Plant and equipment
  $
1,460,180
    $
1,477,411
 
Furniture and office equipment
   
162,781
     
119,123
 
Vehicles
   
185,866
     
58,850
 
Total property and equipment, gross
   
1,808,827
     
1,655,384
 
Accumulated depreciation
   
(649,362
)
   
(488,691
)
Total property and equipment, net
  $
1,159,465
    $
1,166,693