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.