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Note 14 - Fair Value Measurements (Tables)
9 Months Ended
May 31, 2017
Notes Tables  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block]
       
Fair Value Measurements
Using Inputs Considered as
   
Fair Value as of
May 31, 2017
  Level 1   Level 2   Level 3
Available for sale securities   $
3,756,680
    $
3,756,680
    $
    $
 
       
Fair Value Measurements
Using Inputs Considered as
   
Fair Value as of
August 31, 2016
  Level 1   Level 2   Level 3
Available for sale securities   $
2,243,864
    $
2,243,864
    $
    $