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Note 13 - Net Sales by Geographic Location as Percentage of Total Consolidated Net Sales (Details) - USD ($) | 12 Months Ended
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Aug. 31, 2015 | Aug. 31, 2014 | Aug. 31, 2013
Geographic Concentration Risk [Member] | Inside the USA to Unaffiliated Customers [Member] | Percentage of Total Consolidated Net Sales [Member ] |  |  |
Inside the U.S.A. to unaffiliated customers | $ 19,329,979 | $ 17,908,563 | $ 16,027,619
Geographic Concentration Risk [Member] | Joint Ventures in Which the Company is a Shareholder Directly and Indirectly Outside the USA [Member] | Percentage of Total Consolidated Net Sales [Member ] |  |  |
Inside the U.S.A. to unaffiliated customers | 3,240,980 | 3,348,158 | 2,952,612
Geographic Concentration Risk [Member] | Unaffiliated Customers Outside the USA [Member] | Percentage of Total Consolidated Net Sales [Member ] |  |  |
Inside the U.S.A. to unaffiliated customers | 7,751,734 | 5,569,387 | 3,521,633
Inside the U.S.A. to unaffiliated customers | $ 30,322,693 | $ 26,826,108 | $ 22,501,864

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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=26872669&loc=d3e20235-122688 + Details
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