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Note 11 - Geographic And Segment Information (Details) - Operating income by geographic distribution (USD $)	3 Months Ended		9 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2013	May 31, 2012
Segment Reporting Information [Line Items]
Net sales	$ 5,877,033	$ 7,804,904	$ 16,415,130	$ 17,611,346
Operating income	1,493,771	2,438,336	3,337,290	4,162,657
Brazil [Member]
Segment Reporting Information [Line Items]
Net sales			1,699,084	4,004,399
Operating income			(263,353)	1,780,269
North America [Member]
Segment Reporting Information [Line Items]
Net sales			14,716,046	13,606,947
Operating income			$ 3,600,643	$ 2,382,388

X

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

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

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

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Period Type:	duration

X

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
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