Note 11 - Segment and Geographic Information - Cost of Goods Sold by Segment (Details) - USD ($)	3 Months Ended
	Nov. 30, 2023	Nov. 30, 2022
Cost of goods sold	$ 12,847,401	$ 13,599,642
Direct Cost of Goods Sold [Member] | ZERUST [Member]
Cost of goods sold	$ 8,744,024	$ 9,179,254
Cost of goods sold, percentage	56.80%	59.70%
Direct Cost of Goods Sold [Member] | NaturTec [Member]
Cost of goods sold	$ 3,228,583	$ 3,570,673
Cost of goods sold, percentage	67.60%	77.90%
Indirect Cost of Goods Sold [Member]
Cost of goods sold	$ 874,794	$ 849,715