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Note 11 - Segment and Geographic Information - Total Net Sales by Geographic Distribution (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Net sales by segment	$ 13,233,783	$ 13,315,404	$ 27,865,183	$ 27,409,456
CHINA
Net sales by segment	3,024,384	3,005,199	6,885,956	6,173,259
BRAZIL
Net sales by segment	823,218	726,799	1,715,196	1,551,595
INDIA
Net sales by segment	2,059,564	2,224,149	4,095,774	3,875,790
Other Countries [Member]
Net sales by segment	967,111	891,317	2,661,665	2,416,938
UNITED STATES
Net sales by segment	$ 6,359,506	$ 6,467,940	$ 12,506,592	$ 13,391,874

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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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
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-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

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