Note 10 - Net Income (Loss) Per Common Share - Reconciliation of the Earnings Per Share Computations (Details) - USD ($)	12 Months Ended
	Aug. 31, 2016	Aug. 31, 2015
Net (loss) income attributable to NTIC	$ (867,514)	$ 1,789,571
Basic-weighted shares outstanding (in shares)	4,537,504	4,521,788
Weighted shares assumed upon exercise of stock options (in shares)	0	127,272
Diluted – weighted shares outstanding (in shares)	4,537,504	4,649,060
Basic income (loss) earnings per share: (in dollars per share)	$ (0.19)	$ 0.40
Diluted income (loss) earnings per share: (in dollars per share)	$ (0.19)	$ 0.38