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Note 11 - Segment and Geographical Information - Total Net Sales by Geographic Distribution (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
CHINA
Net sales by segment			6,106,942	3,296,299
BRAZIL
Net sales by segment			1,456,456	1,118,166
INDIA
Net sales by segment			1,078,294	733,581
GERMANY
Net sales by segment			244,802	217,496
Other Countries [Member]
Net sales by segment			1,363,151	1,531,759
UNITED STATES
Net sales by segment			$ 13,507,368	$ 11,547,625

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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=63488584&loc=d3e20235-122688

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