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Note 13 - Segment and Geographic Information (Tables) | 3 Months Ended
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Nov. 30, 2021
Notes Tables |
Reconciliation of Revenue from Segments to Consolidated [Table Text Block] |
|  | Three Months Ended |
|  | November 30, 2021 |  |  | November 30, 2020 |
ZERUST® net sales |  | $ | 14,423,785 |  |  | $ | 10,220,551 |
Natur-Tec® net sales |  |  | 3,769,628 |  |  |  | 2,558,561 |
Total net sales |  | $ | 18,193,413 |  |  | $ | 12,779,112 |
Reconciliation of Cost of Goods Sold from Segments to Consolidated [Table Text Block] |
|  | November 30, 2021 |  |  | % of Product Sales* |  |  | November 30, 2020 |  |  | % of Product Sales* |
Direct cost of goods sold |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ZERUST® |  | $ | 8,706,667 |  |  |  | 60.4 | % |  | $ | 5,771,089 |  |  |  | 56.5 | %
Natur-Tec® |  |  | 2,922,098 |  |  |  | 77.5 | % |  |  | 1,767,630 |  |  |  | 69.1 | %
Indirect cost of goods sold |  |  | 861,718 |  |  | NA |  |  |  | 774,602 |  |  | NA |
Total net cost of goods sold …. |  | $ | 12,490,483 |  |  |  |  |  |  | $ | 8,313,321 |  |  |  |  |
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] |
|  | Three Months Ended |
|  | November 30, 2021 |  |  | November 30, 2020 |
Inside the U.S.A. to unaffiliated customers |  | $ | 6,156,322 |  |  | $ | 4,861,355 |
Outside the U.S.A. to: |  |  |  |  |  |  |  |
Joint ventures in which the Company is a shareholder directly and indirectly |  |  | 840,439 |  |  |  | 580,304 |
Unaffiliated customers |  |  | 11,196,652 |  |  |  | 7,337,453 |
|  | $ | 18,193,413 |  |  | $ | 12,779,112 |
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] |
|  | As of November 30, 2021 |  |  | As of August 31, 2021 |
China |  | $ | 5,380,922 |  |  | $ | 5,110,071 |
Other |  |  | 668,393 |  |  |  | 453,199 |
United States |  |  | 6,145,359 |  |  |  | 6,258,188 |
Total property and equipment, net |  | $ | 12,194,674 |  |  | $ | 11,821,458 |
Revenue from External Customers by Geographic Areas [Table Text Block] |
|  | Three Months Ended |
|  | November 30, 2021 |  |  | November 30, 2020 |
China |  | $ | 4,057,853 |  |  | $ | 4,543,978 |
Brazil |  |  | 1,296,217 |  |  |  | 713,853 |
India |  |  | 4,476,984 |  |  |  | 1,200,468 |
Other |  |  | 2,206,037 |  |  |  | 1,459,458 |
United States |  |  | 6,156,322 |  |  |  | 4,861,355 |
Total net sales |  | $ | 18,193,413 |  |  | $ | 12,779,112 |
Fees for Services Provided to Joint Ventures [Member] |
Notes Tables |
Reconciliation of Revenue from Segments to Consolidated [Table Text Block] |
|  | Three Months Ended |
|  | November 30, 2021 |  |  | % of Total Fees for Services Provided to Joint Ventures |  |  | November 30, 2020 |  |  | % of Total Fees for Services Provided to Joint Ventures |
Germany |  | $ | 218,430 |  |  |  | 17.3 | % |  | $ | 228,826 |  |  |  | 17.1 | %
Poland |  |  | 176,927 |  |  |  | 14.1 | % |  |  | 189,410 |  |  |  | 14.2 | %
Japan |  |  | 166,807 |  |  |  | 13.3 | % |  |  | 179,962 |  |  |  | 13.5 | %
France |  |  | 116,292 |  |  |  | 9.2 | % |  |  | 105,907 |  |  |  | 7.9 | %
Sweden |  |  | 108,070 |  |  |  | 8.6 | % |  |  | 90,489 |  |  |  | 6.8 | %
United Kingdom |  |  | 94,927 |  |  |  | 7.5 | % |  |  | 61,915 |  |  |  | 4.6 | %
Thailand |  |  | 87,554 |  |  |  | 7.0 | % |  |  | 89,932 |  |  |  | 6.7 | %
Finland |  |  | 80,173 |  |  |  | 6.4 | % |  |  | 76,283 |  |  |  | 5.7 | %
Czech Republic |  |  | 70,098 |  |  |  | 5.6 | % |  |  | 69,353 |  |  |  | 5.2 | %
South Korea |  |  | 62,626 |  |  |  | 5.0 | % |  |  | 85,079 |  |  |  | 6.4 | %
Other |  |  | 76,954 |  |  |  | 6.0 | % |  |  | 71,197 |  |  |  | 5.3 | %
|  | $ | 1,258,858 |  |  |  | 100.0 | % |  | $ | 1,336,561 |  |  |  | 100.0 | %

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