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Note 11 - Segment and Geographic Information (Tables)

3 Months Ended

Nov. 30, 2019

Notes Tables

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

		Three Months Ended
		November 30, 2019				November 30, 2018
ZERUST ® net sales		$	9,949,512			$	10,065,174
Natur-Tec ® net sales			4,681,888				4,028,878
Total net sales		$	14,631,400			$	14,094,052

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

		November 30, 2019				% of Product Sales*				November 30, 2018				% of Product Sales*
Direct cost of goods sold
ZERUST®		$	5,543,355				55.7	%		$	5,621,700				55.9	%
Natur-Tec®			3,614,419				77.2	%			3,156,076				78.3	%
Indirect cost of goods sold			647,311				NA				683,361				NA
Total net cost of goods sold		$	9,805,085							$	9,461,137

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

		Three Months Ended
		November 30, 2019				November 30, 2018
Inside the U.S.A. to unaffiliated customers		$	6,147,086			$	6,923,934
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly			585,616				483,187
Unaffiliated customers			7,898,698				6,686,931
		$	14,631,400			$	14,094,052

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

		At November 30, 2019				At August 31, 2019
China		$	310,821			$	337,162
Brazil			172,753				101,548
Germany			23,435				14,791
India			57,916				61,748
United States			6,781,553				6,842,910
Total property and equipment		$	7,346,478			$	7,358,159

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

		Three Months Ended
		November 30, 2019				November 30, 2018
China		$	3,861,572			$	3,168,060
Brazil			891,978				824,796
India			2,036,210				1,651,641
Germany			—				6,472
Other			1,694,554				1,519,149
United States			6,147,086				6,923,934
Total net sales		$	14,631,400			$	14,094,052

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, 2019				% of Total Fees for Services Provided to Joint Ventures				November 30, 2018				% of Total Fees for Services Provided to Joint Ventures
Germany		$	212,101				15.6	%		$	214,992				15.1	%
Poland			194,978				14.4	%			181,844				12.7	%
Japan			163,929				12.1	%			169,800				11.9	%
Sweden			109,506				8.1	%			130,243				9.1	%
Thailand			102,334				7.5	%			98,348				6.9	%
France			93,631				6.9	%			110,062				7.7	%
Czech Republic			89,014				6.6	%			89,692				6.3	%
United Kingdom			85,478				6.3	%			94,781				6.6	%
India			82,960				6.1	%			94,727				6.6	%
South Korea			76,032				5.6	%			86,467				6.1	%
Finland			67,942				5.0	%			81,816				5.7	%
Other			80,420				5.9	%			75,663				5.3	%
		$	1,358,325				100.0	%		$	1,428,435				100.0	%

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