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Note 12 - Segment and Geographic Information - Net Sales by Geographic Location (Details) - USD ($)	3 Months Ended		9 Months Ended
	May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016
Net sales by segment	$ 10,223,019	$ 8,686,575	$ 28,667,945	$ 23,415,946
Inside the USA to Unaffiliated Customers [Member]
Net sales by segment	5,967,459	5,559,885	16,363,291	14,762,170
Joint Ventures in Which the Company is a Shareholder Directly and Indirectly Outside the USA [Member]
Net sales by segment	862,136	446,322	2,115,511	1,967,370
Unaffiliated Customers Outside the USA [Member]
Net sales by segment	$ 3,393,424	$ 2,680,368	$ 10,189,143	$ 6,686,406

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=63488584&loc=d3e20235-122688

+ Details

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