Note 11 - Segment and Geographic Information - Cost of Goods Sold by Segment (Details) - USD ($)		3 Months Ended		9 Months Ended
		May 31, 2023	May 31, 2022	May 31, 2023	May 31, 2022
Cost of goods sold		$ 13,280,584	$ 12,722,833	$ 38,747,865	$ 36,977,620
Indirect Cost of Goods Sold [Member]
Cost of goods sold		587,817	881,289	2,258,684	2,580,601
ZERUST [Member] | Direct Cost of Goods Sold [Member]
Cost of goods sold		$ 9,116,091	$ 8,409,392	$ 26,410,796	$ 25,267,333
Percent of product sales	[1]	56.60%	58.20%	57.50%	60.20%
NaturTec [Member] | Direct Cost of Goods Sold [Member]
Cost of goods sold		$ 3,576,676	$ 3,432,152	$ 10,078,385	$ 9,129,686
Percent of product sales	[1]	73.50%	76.00%	76.00%	76.60%

[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.