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Note 9 - Net Income Per Common Share | 3 Months Ended
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Nov. 30, 2012
Earnings Per Share [Text Block] | 9. NET INCOME PER COMMON SHARE Basic net income per common share is computed by dividing net income by the weighted average number of common shares outstanding. Diluted net income per share assumes the exercise of stock options using the treasury stock method, if dilutive. Options to purchase shares of common stock of 48,000 were excluded from the computation of common share equivalents for the three months ended November 30, 2012, as the exercise prices of such options were greater than market price of a share of common stock. Options to purchase shares of common stock of 26,000 were excluded from the computation of common share equivalents for the three months ended November 30, 2011, as the exercise prices of such options were greater than market price of a share of common stock. The following is a reconciliation of the earnings per share computation for the three months ended November 30, 2012 and 2011:
|  | Three Months Ended |
Numerator: |  | November 30, 2012 |  |  | November 30, 2011 |
Net income attributable to NTIC |  | $ | 389,622 |  |  | $ | 958,757 |
Denominator: |  |  |  |  |  |  |  |
Basic – weighted shares outstanding |  |  | 4,406,205 |  |  |  | 4,355,666 |
Weighted shares assumed upon exercise of stock options |  |  | 34,231 |  |  |  | 78,058 |
Diluted – weighted shares outstanding |  |  | 4,440,436 |  |  |  | 4,433,724 |
Basic earnings per share: |  | $ | 0.09 |  |  | $ | 0.22 |
Diluted earnings per share: |  | $ | 0.09 |  |  | $ | 0.22 |
The dilutive impact summarized above relates to the periods when the average market price of the Company’s common stock exceeded the exercise price of the potentially dilutive option securities granted. Earnings per common share were based on the weighted average number of common shares outstanding during the periods when computing the basic earnings per share. When dilutive, stock options are included as equivalents using the treasury stock market method when computing the diluted earnings per share.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=16381557&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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