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Note 11 - Geographic And Segment Information (Details) - Net Sales By Segment (USD $)	3 Months Ended		9 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2013	May 31, 2012
Segment Reporting, Revenue Reconciling Item [Line Items]
Net Sales	$ 5,877,033	$ 7,804,904	$ 16,415,130	$ 17,611,346
ZERUST [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net Sales	5,418,271	7,220,258	14,923,966	16,243,683
Natur-Tec [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net Sales	$ 458,762	$ 584,646	$ 1,491,164	$ 1,367,663

X

- 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=26872669&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

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_SegmentReportingRevenueReconcilingItemLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration