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Note 11 - Segment and Geographical Information - Total Net Sales by Geographic Distribution (Details) - USD ($)	3 Months Ended
	Nov. 30, 2018	Nov. 30, 2017
Net sales by segment	$ 14,094,052	$ 11,543,038
CHINA
Net sales by segment	3,168,060	2,911,643
BRAZIL
Net sales by segment	824,796	639,841
INDIA
Net sales by segment	1,651,641	495,539
GERMANY
Net sales by segment	6,472	48,771
Other Countries [Member]
Net sales by segment	1,519,149	1,191,039
UNITED STATES
Net sales by segment	$ 6,923,934	$ 6,256,205

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
-Paragraph 32
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-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

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