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Note 12 - Geographic And Segment Information (Detail) - Net Sales By Segment: (USD $) | 3 Months Ended | 12 Months Ended
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Aug. 31, 2012 | May 31, 2012 | Feb. 29, 2012 | Nov. 30, 2011 | Aug. 31, 2011 | May 31, 2011 | Feb. 28, 2011 | Nov. 30, 2010 | Aug. 31, 2012 | Aug. 31, 2011
Net Sales | $ 5,170,307 | $ 7,804,904 | $ 4,974,328 | $ 4,832,114 | $ 5,549,190 | [1] | $ 5,100,778 | $ 4,778,118 | $ 4,098,441 | $ 22,781,653 | $ 19,526,527
$ Change |  |  |  |  |  |  |  |  |  | 3,255,126 |
% Change |  |  |  |  |  |  |  |  |  | 16.70% |
ZERUST [Member] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  |  | 20,971,275 | 18,542,523
$ Change |  |  |  |  |  |  |  |  |  | 2,428,752 |
% Change |  |  |  |  |  |  |  |  |  | 13.10% |
Natur-Tec [Member] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  |  | 1,810,378 | 984,004
$ Change |  |  |  |  |  |  |  |  |  | $ 826,374 |
% Change |  |  |  |  |  |  |  |  |  | 84.00% |
[1] | During the fourth quarter of fiscal 2010, the Company decided to consolidate the financial results of the Company's majority owned Brazilian subsidiary, Zerust Prevencao de Corrosao S.A., for the fiscal year ended August 31, 2010. As a result, all revenues and expenses of Zerust Brazil for the fiscal year ended August 31, 2010 are included in the fourth quarter of fiscal 2010.

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- Definition Represents the percentage change in net sales from the prior fiscal year. + References No definition available. + Details
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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