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Note 9 - Net Income Per Common Share - Reconciliation of the Earnings Per Share Computations (Details) - USD ($)	12 Months Ended
	Aug. 31, 2018	Aug. 31, 2017
Net income attributable to NTIC	$ 6,701,366	$ 3,422,126
Basic-weighted shares outstanding (in shares)	4,538,838	4,528,611
Weighted shares assumed upon exercise of stock options (in shares)	146,364	48,748
Diluted – weighted shares outstanding (in shares)	4,685,202	4,577,359
Basic (in dollars per share)	$ 1.48	$ 0.76
Diluted (in dollars per share)	$ 1.43	$ 0.75

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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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