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Note 14 - Supplemental Cash Flow Information (Tables)
 3 Months Ended
Nov. 30, 2017
Notes Tables  
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
   
Three Months Ended
  
   
November 30,

2017		  
November 30,

2016		  
   Cash paid for interest   $
5,089
 
   $
4,623
 
  
   Cash paid for income taxes    
—
 
    
—
 
  
    Three Months Ended  
    November 30,
2017		   November 30,
2016		  
   Dividends declared, not paid   $
454,741
      
—