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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 | 6 Months Ended
--- | --- | ---
Feb. 28, 2013 | Feb. 29, 2012 | Feb. 28, 2013 | Feb. 29, 2012
Net sales | $ 5,246,350 | $ 4,974,328 | $ 10,538,097 | $ 9,806,442
Cost of goods sold | 3,633,913 | 3,480,082 | 7,324,885 | 6,689,558
Gross profit | 1,612,437 | 1,494,246 | 3,213,212 | 3,116,884
Joint venture operations | 2,909,319 | 2,522,801 | 5,909,892 | 5,325,733
Operating expenses | 3,551,901 | 3,325,228 | 7,279,585 | 6,718,296
Operating income | 969,855 | 691,819 | 1,843,519 | 1,724,321
Income before income tax expense | 985,155 | 703,991 | 1,877,691 | 1,745,412
Income tax expense | 240,000 | 100,000 | 374,000 | 206,000
Net income | 745,155 | 603,991 | 1,503,691 | 1,539,412
Net income attributable to non-controlling interest | 310,745 | (2,202) | 679,659 | (25,538)
Net income attributable to NTIC | 434,410 | 606,193 | 824,032 | 1,564,950
Net income per common diluted share (in Dollars per share) | $ 0.10 | $ 0.14 | $ 0.18 | $ 0.35
As Reported [Member] |  |  |  |
Net sales |  | 4,974,328 |  | 9,806,442
Cost of goods sold |  | 3,480,082 |  | 6,689,558
Gross profit |  | 1,494,246 |  | 3,116,884
Joint venture operations |  | 2,522,801 |  | 5,325,733
Operating expenses |  | 3,325,228 |  | 6,718,296
Operating income |  | 691,819 |  | 1,724,321
Income before income tax expense |  | 703,991 |  | 1,745,412
Income tax expense |  | 100,000 |  | 206,000
Net income |  | 603,991 |  | 1,539,412
Net income attributable to non-controlling interest |  | (2,202) |  | (25,538)
Net income attributable to NTIC |  | 606,193 |  | 1,564,950
Net income per common diluted share (in Dollars per share) |  | $ 0.13 |  | $ 0.35
NTI ASEAN [Member] |  |  |  |
Joint venture operations |  | 868,382 |  | 1,699,280
Operating expenses |  | 20,470 |  | 23,135
Operating income |  | 847,912 |  | 1,676,145
Income before income tax expense |  | 847,912 |  | 1,676,145
Income tax expense |  | 95,500 |  | 184,811
Net income |  | 752,412 |  | 1,491,334
Net income attributable to non-controlling interest |  | (300,965) |  | (596,534)
Net income attributable to NTIC |  | 451,447 |  | 894,800
Net income per common diluted share (in Dollars per share) |  | $ 0.10 |  | $ 0.20
Eliminated in Consolidation [Member] |  |  |  |
Joint venture operations |  | (322,654) |  | (692,115)
Operating income |  | (322,654) |  | (692,115)
Income before income tax expense |  | (322,654) |  | (692,115)
Net income |  | (322,654) |  | (692,115)
Net income attributable to NTIC |  | (322,654) |  | (692,115)
Net income per common diluted share (in Dollars per share) |  | $ (0.08) |  | $ (0.16)
Pro Forma [Member] |  |  |  |
Net sales |  | 4,974,328 |  | 9,806,442
Cost of goods sold |  | 3,480,082 |  | 6,689,558
Gross profit |  | 1,494,246 |  | 3,116,884
Joint venture operations |  | 3,068,529 |  | 6,332,898
Operating expenses |  | 3,345,698 |  | 6,741,431
Operating income |  | 1,217,077 |  | 2,708,351
Income before income tax expense |  | 1,229,249 |  | 2,729,442
Income tax expense |  | 195,500 |  | 390,811
Net income |  | 1,033,749 |  | 2,338,631
Net income attributable to non-controlling interest |  | (303,167) |  | (622,072)
Net income attributable to NTIC |  | $ 734,804 |  | $ 1,767,635
Net income per common diluted share (in Dollars per share) |  | $ 0.16 |  | $ 0.40

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