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Note 9 - Net Income Per Common Share - Reconciliation of the Earnings Per Share Computations (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Net income attributable to NTIC	$ 179,834	$ 1,401,568	$ 1,392,384	$ 2,898,627
Basic – weighted shares outstanding (in shares)	9,097,236	9,084,354	9,095,604	9,084,350
Weighted shares assumed upon exercise of stock options (in shares)	364,491	363,506	288,263	378,866
Diluted – weighted shares outstanding (in shares)	9,461,727	9,447,860	9,383,867	9,463,216
Basic net income per share: (in dollars per share)	$ 0.02	$ 0.16	$ 0.15	$ 0.32
Diluted net income per share: (in dollars per share)	$ 0.02	$ 0.15	$ 0.15	$ 0.31

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- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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