Note 12 - Segment and Geographic Information - Net Sales by Segment (Details) - USD ($)	12 Months Ended
Aug. 31, 2025	Aug. 31, 2024
Net sales	$ 84,234,474	$ 85,059,517
ZERUST [Member]
Net sales	62,488,397	63,092,575
NaturTec [Member]
Net sales	$ 21,746,077	$ 21,966,942

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details