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Note 11 - Segment and Geographical Information - Net Sales by Geographic Location (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Net sales by segment	$ 12,213,975	$ 8,742,903	$ 23,757,013	$ 18,444,926
Inside the USA to Unaffiliated Customers [Member]
Net sales by segment	6,079,835	5,245,092	12,336,040	10,395,832
Joint Ventures in Which the Company is a Shareholder Directly and Indirectly Outside the USA [Member]
Net sales by segment	814,122	433,317	1,321,753	1,253,375
Unaffiliated Customers Outside the USA [Member]
Net sales by segment	$ 5,320,018	$ 3,064,494	$ 10,099,220	$ 6,795,719

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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