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Note 10 - Net Income (Loss) Per Common Share (Tables) | 12 Months Ended
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Aug. 31, 2016
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
Numerator: |  | August 31, 2016 |  | August 31, 2015
Net (loss) income attributable to NTIC |  | $ | (867,514 | ) |  | $ | 1,789,571 |
Denominator: |  |  |  |  |  |  |  |
Basic-weighted shares outstanding |  |  | 4,537,504 |  |  |  | 4,521,788 |
Weighted shares assumed upon exercise of stock options |  |  | 0 |  |  |  | 127,272 |
Diluted – weighted shares outstanding |  |  | 4,537,504 |  |  |  | 4,649,060 |
Basic income (loss) earnings per share: |  | $ | (0.19 | ) |  | $ | 0.40 |
Diluted income (loss) earnings per share: |  | $ | (0.19 | ) |  | $ | 0.38 |

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