Note 12 - Segment and Geographic Information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($)	3 Months Ended		9 Months Ended
	May 31, 2025	May 31, 2024	May 31, 2025	May 31, 2024
Gross profit	$ 8,259,440	$ 7,893,094	$ 23,217,977	$ 23,566,532
Indirect cost of goods sold	(13,249,123)	(12,793,103)	(38,701,045)	(38,143,878)
Total joint venture operations	2,272,912	2,609,228	6,377,617	7,441,476
Selling expenses	(4,375,956)	(4,232,887)	(12,515,638)	(12,053,839)
General and administrative expenses	(4,150,966)	(3,500,113)	(11,668,492)	(10,253,966)
Research and development expenses	(1,138,243)	(1,245,405)	(3,770,539)	(3,593,582)
Interest income	37,821	23,744	273,544	99,396
Interest expense	(162,096)	(59,939)	(421,471)	(248,835)
Other income	0	0	1,139,756	0
Income before income tax expense	742,912	1,487,722	2,632,754	4,957,182
Indirect Cost of Goods Sold [Member]
Indirect cost of goods sold	(572,626)	(855,967)	(2,322,628)	(2,583,254)
Operating Segments [Member]
Gross profit	8,832,066	8,749,061	25,540,605	26,149,786
ZERUST [Member] | Operating Segments [Member]
Gross profit	6,609,307	6,669,020	19,422,244	20,466,674
NaturTec [Member] | Operating Segments [Member]
Gross profit	$ 2,222,759	$ 2,080,041	$ 6,118,361	$ 5,683,112