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Note 19 - Quaterly Information (Unaudited) (Tables) | 12 Months Ended
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Aug. 31, 2013
Note 19 - Quaterly Information (Unaudited) (Tables) [Line Items] |
Schedule of Quarterly Financial Information [Table Text Block] |
|  | Fiscal Quarter Ended |
|  | November 30 |  |  | February 28 |  |  | May 31 |  |  | August 31 |
Fiscal year 2013: |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 5,291,747 |  |  | $ | 5,246,350 |  |  | $ | 5,877,033 |  |  | $ | 6,086,734 |
Gross profit |  |  | 1,600,775 |  |  |  | 1,612,437 |  |  |  | 1,822,669 |  |  |  | 1,992,771 |
Income before income tax expense |  |  | 892,536 |  |  |  | 985,155 |  |  |  | 1,445,769 |  |  |  | 2,294,041 |
Income tax expense |  |  | 134,000 |  |  |  | 240,000 |  |  |  | 158,000 |  |  |  | 332,000 |
Net income |  |  | 758,536 |  |  |  | 745,155 |  |  |  | 1,287,769 |  |  |  | 1,962,041 |
Net income attributable to noncontrolling interest |  |  | 368,914 |  |  |  | 310,745 |  |  |  | 360,657 |  |  |  | 346,291 |
Net income attributable to NTIC |  |  | 389,622 |  |  |  | 434,410 |  |  |  | 927,112 |  |  |  | 1,615,750 |
Net income per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.09 |  |  | $ | 0.10 |  |  | $ | 0.21 |  |  | $ | 0.37 |
Diluted |  | $ | 0.09 |  |  | $ | 0.10 |  |  | $ | 0.21 |  |  | $ | 0.36 |
Weighted average common shares assumed outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 4,406,205 |  |  |  | 4,418,821 |  |  |  | 4,421,379 |  |  |  | 4,431,948 |
Diluted |  |  | 4,440,436 |  |  |  | 4,485,076 |  |  |  | 4,468,861 |  |  |  | 4,501,017 |
Prior Period [Member] |
Note 19 - Quaterly Information (Unaudited) (Tables) [Line Items] |
Schedule of Quarterly Financial Information [Table Text Block] |
|  | Fiscal Quarter Ended |
|  | November 30 |  |  | February 29 |  |  | May 31 |  |  | August 31 |
Fiscal year 2012: |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 4,832,114 |  |  | $ | 4,974,328 |  |  | $ | 7,804,904 |  |  | $ | 5,170,307 |
Gross profit |  |  | 1,622,638 |  |  |  | 1,494,246 |  |  |  | 3,661,390 |  |  |  | 1,474,594 |
Income before income tax expense |  |  | 1,041,421 |  |  |  | 703,991 |  |  |  | 2,454,623 |  |  |  | 416,611 |
Income tax expense (benefit) |  |  | 106,000 |  |  |  | 100,000 |  |  |  | 814,000 |  |  |  | (32,000 | )
Net income |  |  | 935,421 |  |  |  | 603,991 |  |  |  | 1,640,623 |  |  |  | 448,611 |
Net income per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.22 |  |  | $ | 0.14 |  |  | $ | 0.33 |  |  | $ | 0.10 |
Diluted |  | $ | 0.22 |  |  | $ | 0.14 |  |  | $ | 0.33 |  |  | $ | 0.10 |
Weighted average common shares assumed outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 4,355,666 |  |  |  | 4,398,356 |  |  |  | 4,399,290 |  |  |  | 4,403,656 |
Diluted |  |  | 4,433,724 |  |  |  | 4,466,435 |  |  |  | 4,461,044 |  |  |  | 4,436,444 |

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=25249566&loc=d3e1280-108306 + Details
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