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Note 3 - Inventories (Tables)
 3 Months Ended
Nov. 30, 2017
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
    November 30, 2017   August 31, 2017
Production materials   $
1,851,735
     $
1,747,189
  
Finished goods    
6,117,593
      
5,709,363
  
    $
7,969,328
     $
7,456,552