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Note 9 - Net Income Per Common Share (Details) - Reconciliation of the Earnings Per Share Computations (USD $)	3 Months Ended
	Nov. 30, 2013	Nov. 30, 2012
Reconciliation of the Earnings Per Share Computations [Abstract]
Net income attributable to NTIC (in Dollars)	$ 858,586	$ 389,622
Basic – weighted shares outstanding	4,434,770	4,406,205
Weighted shares assumed upon exercise of stock options	117,899	34,231
Diluted – weighted shares outstanding	4,552,669	4,440,436
Basic earnings per share: (in Dollars per share)	$ 0.19	$ 0.09
Diluted earnings per share: (in Dollars per share)	$ 0.19	$ 0.09

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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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