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Note 11 - Geographic And Segment Information (Detail) - Operating income by geographic distribution: (USD $) | 3 Months Ended
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Nov. 30, 2012 | Nov. 30, 2011
Net sales | $ 5,291,747 | $ 4,832,114
Operating income | 873,664 | 1,032,502
Brazil [Member] |  |
Net sales | 551,814 | 604,920
Operating income | (23,148) | (155,174)
North America [Member] |  |
Net sales | 4,739,933 | 4,227,194
Operating income | $ 896,812 | $ 1,187,676

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- 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_
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Balance Type: | credit
Period Type: | duration

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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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Period Type: | duration