Note 10 - Reconciliation of the Earnings Per Share Computations (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015
Net (loss) income attributable to NTIC	$ (107,789)	$ (128,644)	$ (342,140)	$ 879,621
Basic – weighted shares outstanding (in shares)	4,537,429	4,522,514	4,536,995	4,516,311
Weighted shares assumed upon exercise of stock options (in shares)				139,481
Diluted – weighted shares outstanding (in shares)	4,537,429	4,522,514	4,536,995	4,655,792
Basic (loss) income per share: (in dollars per share)	$ (0.02)	$ (0.03)	$ (0.08)	$ 0.20
Diluted (loss) income per share: (in dollars per share)	$ (0.02)	$ (0.03)	$ (0.08)	$ 0.19