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Note 11 - Segment and Geographic Information (Tables)

12 Months Ended

Aug. 31, 2024

Notes Tables

Reconciliation of Revenue from Segments to Consolidated [Table Text Block]

		Fiscal 2024				Fiscal 2023
ZERUST® net sales		$	63,092,575			$	61,728,364
Natur-Tec® net sales			21,966,942				18,174,588
Total net sales		$	85,059,517			$	79,902,952

Reconciliation of Cost of Goods Sold from Segments to Consolidated [Table Text Block]

		Fiscal 2024				Fiscal 2023
Direct cost of goods sold
ZERUST®		$	33,623,834			$	35,297,352
Natur-Tec®			14,148,145				13,645,992
Indirect cost of goods sold			3,501,176				3,155,777
Total net cost of goods sold		$	51,273,155			$	52,099,121

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

		Fiscal Year Ended August 31,
		2024				2023
Inside the U.S. to unaffiliated customers		$	30,492,665			$	28,554,354
Outside the U.S. to:
Joint ventures in which the Company is a shareholder directly and indirectly			2,228,894				3,401,910
Unaffiliated customers			52,337,958				47,946,688
		$	85,059,517			$	79,902,952

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

		At August 31, 2024				At August 31, 2023
China		$	5,627,202			$	5,729,080
Other			1,217,400				745,469
United States			9,421,051				7,590,805
Total property and equipment		$	16,265,653			$	14,065,354

Revenue from External Customers by Geographic Areas [Table Text Block]

		Fiscal Year Ended August 31, 2024				Fiscal Year Ended August 31, 2023
China		$	14,245,238			$	13,469,075
Brazil			5,994,372				5,969,314
India			22,189,317				19,916,834
Other			12,137,925				11,993,375
United States			30,492,665				28,554,354
Total net sales		$	85,059,517			$	79,902,952

Fees for Services Provided to Joint Ventures [Member]

Notes Tables

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

		Fiscal 2024				% of Total Fees for Services Provided to Joint Ventures				Fiscal 2023				% of Total Fees for Services Provided to Joint Ventures
Poland		$	849,736				16.2	%		$	810,977				15.6	%
Germany			828,932				15.8	%			816,089				15.7	%
Japan			582,674				11.1	%			658,934				12.7	%
France			485,627				9.3	%			479,515				9.2	%
Sweden			445,560				8.5	%			498,463				9.6	%
Finland			395,515				7.5	%			388,627				7.5	%
United Kingdom			375,150				7.1	%			283,418				5.5	%
Czech Republic			338,195				6.4	%			365,018				7.0	%
Thailand			332,148				6.3	%			340,657				6.6	%
South Korea			258,314				4.9	%			266,562				5.1	%
Indonesia			166,053				3.2	%			130,081				2.5	%
Other			193,878				3.7	%			150,844				3.0	%
		$	5,251,782				100.0	%		$	5,189,185				100.0	%

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