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Note 11 - Segment and Geographic Information (Tables)

12 Months Ended

Aug. 31, 2020

Notes Tables

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

		Fiscal 2020				Fiscal 2019
ZERUST ® net sales		$	34,474,535			$	38,174,712
Natur-Tec ® net sales			13,164,156				17,575,425
Total net sales		$	47,638,691			$	55,750,137

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

		Fiscal 2020				Fiscal 2019
Direct cost of goods sold
ZERUST®		$	18,717,684			$	21,505,335
Natur-Tec®			10,168,051				13,691,038
Indirect cost of goods sold			2,723,539				2,773,871
Total net cost of goods sold		$	31,609,274			$	37,970,244

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

		Fiscal Year Ended August 31,
		2020				2019
Inside the U.S.A. to unaffiliated customers		$	20,218,213			$	24,560,459
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly			1,972,646				2,607,554
Unaffiliated customers			25,447,832				28,582,124
		$	47,638,691			$	55,750,137

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

		At August 31, 2020				At August 31, 2019
China		$	376,088			$	337,162
Other			172,833				178,087
United States			6,561,868				6,842,910
Total long-lived assets		$	7,110,789			$	7,358,159

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

		Fiscal Year Ended August 31, 2020				Fiscal Year Ended August 31, 2019
China		$	13,409,770			$	13,030,298
Brazil			2,753,930				3,151,509
India			5,655,797				8,109,468
Other			5,600,982				6,898,403
United States			20,218,212				24,560,459
Total net sales		$	47,638,691			$	55,750,137

Fees for Services Provided to Joint Ventures [Member]

Notes Tables

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

		Fiscal 2020				Fiscal 2019
Germany		$	843,752			$	852,526
Japan			628,889				748,489
Poland			553,198				704,942
Sweden			372,017				589,654
Thailand			328,452				418,334
France			310,661				430,537
Czech Republic			270,032				345,798
South Korea			266,703				346,244
Finland			256,375				281,295
United Kingdom			255,121				319,671
India			250,976				350,172
Other			276,709				339,917
		$	4,612,885			$	5,727,579

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