Consolidated Statements of Operations (USD $)	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012
NET SALES:
Net sales, excluding joint ventures	$ 19,724,205	$ 20,227,719
Net sales, to joint ventures	2,777,659	2,553,934
Total net sales	22,501,864	22,781,653
Cost of goods sold	15,473,212	14,528,785
Gross profit	7,028,652	8,252,868
JOINT VENTURE OPERATIONS:
Equity in income of joint ventures	5,237,711	5,519,795
Fees for services provided to joint ventures	7,352,980	4,622,912
Total joint venture operations	12,590,691	10,142,707
OPERATING EXPENSES:
Selling expenses	4,845,676	4,585,901
General and administrative expenses	4,605,979	4,309,410
Expenses incurred in support of joint ventures	1,387,197	1,054,914
Research and development expenses	3,815,515	3,875,581
Total operating expenses	14,654,367	13,825,806
OPERATING INCOME	4,964,976	4,569,769
INTEREST INCOME	34,614	54,652
INTEREST EXPENSE	(52,215)	(29,388)
OTHER INCOME	670,126	21,613
INCOME BEFORE INCOME TAX EXPENSE	5,617,501	4,616,646
INCOME TAX EXPENSE	864,000	1,041,000
NET INCOME	4,753,501	3,575,646
NET INCOME ATTRIBUTABLE TO NON-CONTROLLING INTEREST	1,386,607	127,450
NET INCOME ATTRIBUTABLE TO NTIC	$ 3,366,894	$ 3,448,196
NET INCOME ATTRIBUTABLE TO NTIC PER COMMON SHARE:
Basic (in Dollars per share)	$ 0.76	$ 0.79
Diluted (in Dollars per share)	$ 0.75	$ 0.78
WEIGHTED AVERAGE COMMON SHARES ASSUMED OUTSTANDING:
Basic (in Shares)	4,421,636	4,391,424
Diluted (in Shares)	4,475,895	4,451,594