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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. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Net income attributable to NTIC	$ 1,332,847	$ 386,966	$ 2,416,473	$ 684,605
Basic – weighted shares outstanding (in shares)	4,537,408	4,525,091	4,537,368	4,527,555
Weighted shares assumed upon exercise of stock options (in shares)	135,930	36,933	103,674	31,930
Diluted – weighted shares outstanding (in shares)	4,673,338	4,562,024	4,641,042	4,559,485
Basic income per share: (in dollars per share)	$ 0.29	$ 0.09	$ 0.53	$ 0.15
Diluted income per share: (in dollars per share)	$ 0.29	$ 0.09	$ 0.52	$ 0.15

X

- 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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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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