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Note 5 - Patents and Trademarks, Net (Tables)
3 Months Ended
Nov. 30, 2016
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
    November 30, 2016   August 31, 2016
Patents and trademarks   $
2,633,635
    $
2,575,435
 
Less accumulated amortization    
(1,326,595
)    
(1,296,838
)
    $
1,307,040
    $
1,278,597