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Note 9 - Net Income Per Common Share - Reconciliation of the Earnings Per Share Computations (Details) - USD ($)	3 Months Ended
	Nov. 30, 2018	Nov. 30, 2017
Net income attributable to NTIC	$ 1,497,059	$ 1,083,626
Basic – weighted shares outstanding (in shares)	4,542,175	4,537,368
Weighted shares assumed upon exercise of stock options (in shares)	197,113	71,420
Diluted – weighted shares outstanding (in shares)	4,739,288	4,608,788
Basic net income per share: (in dollars per share)	$ 0.33	$ 0.24
Diluted net income per share: (in dollars per share)	$ 0.32	$ 0.24

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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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