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Note 11 - Segment and Geographic Information (Tables)

3 Months Ended

Nov. 30, 2018

Notes Tables

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

		Three Months Ended
		November 30, 2018				November 30, 2017
ZERUST® net sales		$	10,065,174			$	9,527,737
Natur-Tec® net sales			4,028,878				2,015,301
Total net sales		$	14,094,052			$	11,543,038

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

		November 30, 2018				% of Product Sales*				November 30, 2017				% of Product Sales*
Direct cost of goods sold
ZERUST®		$	5,621,700				55.9	%		$	5,803,980				60.9	%
Natur-Tec®			3,156,076				78.3	%			1,479,199				73.4	%
Indirect cost of goods sold			683,361				NA				605,291				NA
Total net cost of goods sold		$	9,461,137							$	7,888,470

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

		Three Months Ended
		November 30, 2018				November 30, 2017
Inside the U.S.A. to unaffiliated customers		$	6,923,934			$	6,256,205
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly			483,187				507,631
Unaffiliated customers			6,686,931				4,779,202
		$	14,094,052			$	11,543,038

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

		At November 30, 2018				At August 31, 2018
China		$	188,695			$	205,490
Brazil			76,977				71,677
Germany			6,142				7,058
India			31,101				22,220
United States			6,756,321				6,862,381
Total property and equipment		$	7,059,236			$	7,168,826

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

		Three Months Ended
		November 30, 2018				November 30, 2017
China		$	3,168,060			$	2,911,643
Brazil			824,796				639,841
India			1,651,641				495,539
Germany			6,472				48,771
Other			1,519,149				1,191,039
United States			6,923,934				6,256,205
Total net sales		$	14,094,052			$	11,543,038

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, 2018				% of Total Fees for Services Provided to Joint Ventures				November 30, 2017				% of Total Fees for Services Provided to Joint Ventures
Germany		$	214,992				15.1	%		$	219,873				14.6	%
Poland			181,844				12.7	%			206,076				13.7	%
Japan			169,800				11.9	%			174,045				11.5	%
Sweden			130,243				9.1	%			127,954				8.5	%
France			110,062				7.7	%			139,641				9.3	%
Thailand			98,348				6.9	%			102,531				6.8	%
United Kingdom			94,781				6.6	%			111,775				7.4	%
India			94,727				6.6	%			86,763				5.8	%
Czech Republic			89,692				6.3	%			84,225				5.6	%
South Korea			86,467				6.1	%			83,488				5.5	%
Finland			81,816				5.7	%			89,627				5.9	%
Other			75,663				5.3	%			81,144				5.4	%
		$	1,428,435				100.0	%		$	1,507,142				100.0	%

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