Consolidated Statements of Operations (USD $)	12 Months Ended
	Aug. 31, 2012	Aug. 31, 2011
NET SALES:
Net sales, excluding joint ventures	$ 20,227,719	$ 16,594,004
Net sales, to joint ventures	2,553,934	2,932,523
Total net sales	22,781,653	19,526,527
Cost of goods sold	14,528,785	12,768,640
Gross profit	8,252,868	6,757,887
JOINT VENTURE OPERATIONS:
Equity in income of joint ventures	5,519,795	5,536,243
Fees for services provided to joint ventures	4,622,912	6,129,979
Total joint venture operations	10,142,707	11,666,222
OPERATING EXPENSES:
Selling expenses	4,585,901	4,090,704
General and administrative expenses	4,309,410	4,343,283
Expenses incurred in support of joint ventures	1,054,914	1,000,576
Research and development expenses	3,875,581	4,364,109
Total operating expenses	13,825,806	13,798,672
OPERATING INCOME	4,569,769	4,625,437
INTEREST INCOME	54,652	108,692
INTEREST EXPENSE	(29,388)	(59,541)
OTHER INCOME	21,613	27,300
INCOME BEFORE INCOME TAX EXPENSE	4,616,646	4,701,888
INCOME TAX EXPENSE	1,041,000	706,000
NET INCOME	3,575,646	3,995,888
NET INCOME ATTRIBUTABLE TO NON CONTROLLING INTEREST	127,450	95,768
NET INCOME ATTRIBUTABLE TO NTIC	$ 3,448,196	$ 3,900,120
NET INCOME ATTRIBUTABLE TO NTIC PER COMMON SHARE:
Basic (in Dollars per share)	$ 0.79	$ 0.90
Diluted (in Dollars per share)	$ 0.78	$ 0.89
WEIGHTED AVERAGE COMMON SHARES ASSUMED OUTSTANDING:
Basic (in Shares)	4,391,424	4,325,863
Diluted (in Shares)	4,451,594	4,404,100