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Note 11 - Segment and Geographic Information - Total Net Sales by Geographic Distribution (Details) - USD ($)	3 Months Ended		9 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019
Net sales	$ 9,744,823	$ 14,893,117	$ 37,610,006	$ 42,302,573
CHINA
Net sales	3,089,135	3,691,220	9,975,091	9,864,479
BRAZIL
Net sales	365,222	792,299	2,080,418	2,343,894
INDIA
Net sales	631,551	2,283,346	4,727,325	6,159,136
Other Countries [Member]
Net sales	1,607,206	1,953,370	4,268,871	4,370,308
UNITED STATES
Net sales	$ 4,051,709	$ 6,172,882	$ 16,558,301	$ 19,564,756

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).

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