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Note 10 - Geographic and Segment Information (Details) - Cost of Goods Sold by Segment (USD $) | 3 Months Ended | 9 Months Ended
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May 31, 2014 | May 31, 2013 | May 31, 2014 | May 31, 2013
Note 10 - Geographic and Segment Information (Details) - Cost of Goods Sold by Segment [Line Items] |  |  |  |
Cost of Goods Sold | $ 4,669,322 | $ 4,054,364 | $ 12,879,186 | $ 11,379,249
Direct Cost of Goods Sold [Member] | ZERUST [Member] |  |  |  |
Note 10 - Geographic and Segment Information (Details) - Cost of Goods Sold by Segment [Line Items] |  |  |  |
Cost of Goods Sold | 3,288,809 | 3,115,980 | 9,336,363 | 8,383,345
% of Product Sales | 54.90% | 57.50% | 54.00% | 56.20%
Direct Cost of Goods Sold [Member] | Natur-Tec [Member] |  |  |  |
Note 10 - Geographic and Segment Information (Details) - Cost of Goods Sold by Segment [Line Items] |  |  |  |
Cost of Goods Sold | 695,778 | 367,485 | 1,635,815 | 1,260,305
% of Product Sales | 74.90% | 80.10% | 76.00% | 84.50%
Indirect Cost of Goods Sold [Member] |  |  |  |
Note 10 - Geographic and Segment Information (Details) - Cost of Goods Sold by Segment [Line Items] |  |  |  |
Cost of Goods Sold | $ 684,735 | $ 570,899 | $ 1,907,008 | $ 1,735,599

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- Definition Represents the cost of goods sold as a percentage of product sales. + References No definition available. + Details
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- Details
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- Definition Total costs related to goods produced and sold during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 2 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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