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Note 13 - Cost of Goods Sold by Segment (Details) - USD ($) | 12 Months Ended
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Aug. 31, 2015 | Aug. 31, 2014 | Aug. 31, 2013
Indirect Cost of Goods Sold [Member] | ZERUST [Member] |  |  |
Cost of Goods Sold | $ 14,399,456 | $ 12,941,234 | $ 11,408,604
Indirect Cost of Goods Sold [Member] | NaturTec [Member] |  |  |
Cost of Goods Sold | 3,232,353 | 2,234,736 | 1,731,398
Indirect Cost of Goods Sold [Member] |  |  |
Cost of Goods Sold | 2,924,124 | 2,627,183 | 2,333,210
Cost of Goods Sold | $ 20,555,932 | $ 17,803,153 | $ 15,473,212

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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 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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |