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Note 11 - Segment and Geographic Information - Cost of Goods Sold by Segment (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Feb. 29, 2024 | Feb. 28, 2023 | Feb. 29, 2024 | Feb. 28, 2023
Cost of goods sold |  | $ 12,503,374 | $ 11,967,757 | $ 25,350,775 | $ 25,567,399
Direct Cost of Goods Sold [Member] | ZERUST [Member] |  |  |  |  |
Cost of goods sold |  | $ 8,082,163 | $ 8,115,451 | $ 16,826,187 | $ 17,294,705
Cost of goods sold, percentage | [1] | 53.10% | 56.10% | 54.90% | 58.00%
Direct Cost of Goods Sold [Member] | NaturTec [Member] |  |  |  |  |
Cost of goods sold |  | $ 3,568,719 | $ 2,931,036 | $ 6,797,302 | $ 6,501,709
Cost of goods sold, percentage | [1] | 63.50% | 76.90% | 65.40% | 77.40%
Indirect Cost of Goods Sold [Member] |  |  |  |  |
Cost of goods sold |  | $ 852,492 | $ 921,270 | $ 1,727,286 | $ 1,770,985
[1] | The percent of segment sales is calculated by dividing the direct cost of goods sold for each individual segment category by the net sales for each segment category.

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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 924 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479941/924-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
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