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Note 9 - Net Income Per Common Share (Detail) - Reconciliation of the Earnings Per Share Computations: (USD $)	3 Months Ended		6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012
Net income attributable to NTIC (in Dollars)	$ 434,410	$ 606,193	$ 824,032	$ 1,564,950
Basic – weighted shares outstanding	4,418,821	4,398,356	4,409,954	4,366,932
Weighted shares assumed upon exercise of stock options	66,255	68,079	50,243	73,069
Diluted – weighted shares outstanding	4,485,076	4,466,435	4,460,197	4,440,001
Basic earnings per share: (in Dollars per share)	$ 0.10	$ 0.14	$ 0.19	$ 0.36
Diluted earnings per share: (in Dollars per share)	$ 0.10	$ 0.14	$ 0.18	$ 0.35

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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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