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Note 13 - Segment and Geographic Information (Tables)

3 Months Ended

Nov. 30, 2021

Notes Tables

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

		Three Months Ended
		November 30, 2021				November 30, 2020
ZERUST® net sales		$	14,423,785			$	10,220,551
Natur-Tec® net sales			3,769,628				2,558,561
Total net sales		$	18,193,413			$	12,779,112

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

		November 30, 2021				% of Product Sales*				November 30, 2020				% of Product Sales*
Direct cost of goods sold
ZERUST®		$	8,706,667				60.4	%		$	5,771,089				56.5	%
Natur-Tec®			2,922,098				77.5	%			1,767,630				69.1	%
Indirect cost of goods sold			861,718			NA					774,602			NA
Total net cost of goods sold ….		$	12,490,483							$	8,313,321

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

		Three Months Ended
		November 30, 2021				November 30, 2020
Inside the U.S.A. to unaffiliated customers		$	6,156,322			$	4,861,355
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly			840,439				580,304
Unaffiliated customers			11,196,652				7,337,453
		$	18,193,413			$	12,779,112

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

		As of November 30, 2021				As of August 31, 2021
China		$	5,380,922			$	5,110,071
Other			668,393				453,199
United States			6,145,359				6,258,188
Total property and equipment, net		$	12,194,674			$	11,821,458

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

		Three Months Ended
		November 30, 2021				November 30, 2020
China		$	4,057,853			$	4,543,978
Brazil			1,296,217				713,853
India			4,476,984				1,200,468
Other			2,206,037				1,459,458
United States			6,156,322				4,861,355
Total net sales		$	18,193,413			$	12,779,112

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, 2021				% of Total Fees for Services Provided to Joint Ventures				November 30, 2020				% of Total Fees for Services Provided to Joint Ventures
Germany		$	218,430				17.3	%		$	228,826				17.1	%
Poland			176,927				14.1	%			189,410				14.2	%
Japan			166,807				13.3	%			179,962				13.5	%
France			116,292				9.2	%			105,907				7.9	%
Sweden			108,070				8.6	%			90,489				6.8	%
United Kingdom			94,927				7.5	%			61,915				4.6	%
Thailand			87,554				7.0	%			89,932				6.7	%
Finland			80,173				6.4	%			76,283				5.7	%
Czech Republic			70,098				5.6	%			69,353				5.2	%
South Korea			62,626				5.0	%			85,079				6.4	%
Other			76,954				6.0	%			71,197				5.3	%
		$	1,258,858				100.0	%		$	1,336,561				100.0	%

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