Consolidated Statements of Operations - USD ($)	12 Months Ended
	Aug. 31, 2016	Aug. 31, 2015
NET SALES:
Net sales, excluding joint ventures	$ 30,211,660	$ 27,491,392
Net sales, to joint ventures	2,721,905	2,831,301
Total net sales	32,933,565	30,322,693
Cost of goods sold	22,320,156	20,555,932
Gross profit	10,613,409	9,766,761
JOINT VENTURE OPERATIONS:
Equity in income from joint ventures	4,743,831	5,936,565
Fees for services provided to joint ventures	5,137,710	5,715,491
Total joint venture operations	9,881,541	11,652,056
OPERATING EXPENSES:
Selling expenses	6,255,353	5,820,748
General and administrative expenses	7,230,557	6,531,576
Expenses incurred in support of joint ventures	1,001,812	1,867,570
Research and development expenses	4,724,596	4,047,279
Total operating expenses	19,212,318	18,267,173
OPERATING INCOME	1,282,632	3,151,644
INTEREST INCOME	42,115	34,835
INTEREST EXPENSE	(13,261)	(20,960)
IMPAIRMENT ON INVESTMENT AT CARRYING VALUE (Note 7)	(1,883,668)
OTHER INCOME		515
(LOSS) INCOME BEFORE INCOME TAX EXPENSE	(572,182)	3,166,034
INCOME TAX EXPENSE	626,120	648,674
NET (LOSS) INCOME	(1,198,302)	2,517,360
NET (LOSS) INCOME ATTRIBUTABLE TO NON-CONTROLLING INTERESTS	(330,788)	727,789
NET (LOSS) INCOME ATTRIBUTABLE TO NTIC	$ (867,514)	$ 1,789,571
NET (LOSS) INCOME ATTRIBUTABLE TO NTIC PER COMMON SHARE:
Basic (in dollars per share)	$ (0.19)	$ 0.40
Diluted (in dollars per share)	$ (0.19)	$ 0.38
WEIGHTED AVERAGE COMMON SHARES ASSUMED OUTSTANDING:
Basic (in shares)	4,537,504	4,521,788
Diluted (in shares)	4,537,504	4,649,060