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Note 11 - Segment and Geographic Information (Tables)

3 Months Ended

Nov. 30, 2022

Notes Tables

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

		Three Months Ended
		November 30, 2022				November 30, 2021
ZERUST® net sales		$	15,370,001			$	14,423,785
Natur-Tec® net sales			4,582,765				3,769,628
Total net sales		$	19,952,766			$	18,193,413

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

		November 30, 2022				% of Product Sales*				November 30, 2021				% of Product Sales*
Direct cost of goods sold
ZERUST®		$	9,179,254				59.7	%		$	8,706,667				60.4	%
Natur-Tec®			3,570,673				77.9	%			2,922,098				77.5	%
Indirect cost of goods sold			849,715			NA					861,718			NA
Total net cost of goods sold ….		$	13,599,642							$	12,490,483

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

		Three Months Ended
		November 30, 2022				November 30, 2021
Inside the U.S.A. to unaffiliated customers		$	7,478,161			$	6,156,322
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly			633,465				840,439
Unaffiliated customers			11,841,140				11,196,652
		$	19,952,766			$	18,193,413

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

		At November 30, 2022				At August 31, 2022
China		$	5,740,401			$	5,826,898
Other			631,835				565,022
United States			5,772,916				5,778,573
Total property and equipment, net		$	12,145,152			$	12,170,493

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

		Three Months Ended
		November 30, 2022				November 30, 2021
China		$	3,746,640			$	4,057,853
Brazil			1,367,418				1,296,217
India			4,846,927				4,476,984
Other			2,513,620				2,206,037
United States			7,478,161				6,156,322
Total net sales		$	19,952,766			$	18,193,413

Fees for Services Provided to Joint Ventures [Member]

Notes Tables

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

		Three Months Ended
		November 30, 2022				% of Total Fees for Services Provided to Joint Ventures				November 30, 2021				% of Total Fees for Services Provided to Joint Ventures
Germany		$	193,828				16.4	%		$	218,430				17.4	%
Poland			186,696				15.8	%			176,927				14.1	%
Japan			147,920				12.5	%			166,807				13.3	%
France			109,357				9.3	%			116,295				9.2	%
Sweden			100,436				8.5	%			108,070				8.6	%
Finland			90,432				7.7	%			80,173				6.4	%
Thailand			82,956				7.0	%			87,554				7.0	%
Czech Republic			80,332				6.8	%			70,098				5.6	%
South Korea			63,395				5.4	%			62,626				5.0	%
United Kingdom			57,691				4.9	%			94,927				7.5	%
Other			68,762				5.7	%			76,951				5.9	%
		$	1,181,805				100.0	%		$	1,258,858				100.0	%

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