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Note 2 - NTI ASEAN (Detail) - Pro Forma Effects of Consolidation of NTI Asean on the Company's Consolidated Financial Statements as of the Beginning of the Period For the Three Months Ended November 30, 2011: (USD $) | 3 Months Ended
--- | ---
Nov. 30, 2012 | Nov. 30, 2011
Net sales | $ 5,291,747 | $ 4,832,114
Cost of goods sold | 3,690,972 | 3,209,476
Gross profit | 1,600,775 | 1,622,638
Joint venture operations | 3,000,573 | 2,802,932
Operating expenses | 3,727,684 | 3,393,068
Operating income | 873,664 | 1,032,502
Income before income tax expense | 892,536 | 1,041,421
Income tax expense | 134,000 | 106,000
Net income | 758,536 | 935,421
Net income attributable to non-controlling interest | 368,914 | (23,336)
Net income attributable to NTIC | 389,622 | 958,757
Net income per common diluted share (in Dollars per share) | $ 0.09 | $ 0.22
As Reported [Member] |  |
Net sales |  | 4,832,114
Cost of goods sold |  | 3,209,476
Gross profit |  | 1,622,638
Joint venture operations |  | 2,802,932
Operating expenses |  | 3,393,068
Operating income |  | 1,032,502
Income before income tax expense |  | 1,041,421
Income tax expense |  | 106,000
Net income |  | 935,421
Net income attributable to non-controlling interest |  | (23,336)
Net income attributable to NTIC |  | 958,757
Net income per common diluted share (in Dollars per share) |  | $ 0.22
NTI ASEAN [Member] |  |
Joint venture operations |  | 830,898
Operating expenses |  | 2,665
Operating income |  | 828,233
Income before income tax expense |  | 828,233
Income tax expense |  | 89,311
Net income |  | 738,922
Net income attributable to non-controlling interest |  | (295,569)
Net income attributable to NTIC |  | 443,535
Net income per common diluted share (in Dollars per share) |  | $ 0.10
Eliminated in Consolidation [Member] |  |
Joint venture operations |  | (369,461)
Operating income |  | (369,461)
Income before income tax expense |  | (369,461)
Net income |  | (369,461)
Net income attributable to NTIC |  | (369,461)
Net income per common diluted share (in Dollars per share) |  | $ (0.08)
Pro Forma [Member] |  |
Net sales |  | 4,832,114
Cost of goods sold |  | 3,209,476
Gross profit |  | 1,622,638
Joint venture operations |  | 3,264,369
Operating expenses |  | 3,395,733
Operating income |  | 1,491,274
Income before income tax expense |  | 1,500,193
Income tax expense |  | 195,311
Net income |  | 1,304,882
Net income attributable to non-controlling interest |  | (318,905)
Net income attributable to NTIC |  | $ 1,032,831
Net income per common diluted share (in Dollars per share) |  | $ 0.24

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