Note 13 - Segment and Geographic Information - Net Sales by Geographic Location (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
May 31, 2022 |
May 31, 2021 |
May 31, 2022 |
May 31, 2021 |
|
| Net sales | $ 18,964,921 | $ 15,418,524 | $ 53,906,973 | $ 40,980,518 |
| Inside the USA to Unaffiliated Customers [Member] | ||||
| Net sales | 6,884,726 | 6,717,886 | 18,157,010 | 16,198,372 |
| Joint Ventures in Which the Company is a Shareholder Directly and Indirectly Outside the USA [Member] | ||||
| Net sales | 528,665 | 1,253,919 | 2,252,618 | 2,361,165 |
| Unaffiliated Customers Outside the USA [Member] | ||||
| Net sales | $ 11,551,530 | $ 7,446,719 | $ 33,497,345 | $ 22,420,981 |