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Note 10 - Net Income Per Common Share (Tables)
3 Months Ended
Nov. 30, 2015
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
    Three Months Ended
    November 30, 2015   November 30, 2014
Numerator:                
Net (loss) income attributable to NTIC   $ (234,351 )   $ 1,008,265  
                 
Denominator:                
Basic – weighted shares outstanding     4,538,371       4,518,973  
Weighted shares assumed upon exercise of stock options     -       140,648  
Diluted – weighted shares outstanding     4,538,371       4,659,621  
Basic (loss) earnings per share:   $ (0.05 )   $ 0.22  
Diluted (loss) earnings per share:   $ (0.05 )   $ 0.22