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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

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