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Note 12 - Geographic and Segment Information (Tables)

3 Months Ended

Nov. 30, 2016

Notes Tables

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

		Three Months Ended
		November 30, 2016				November 30, 2015
ZERUST® net sales		$	8,084,678			$	5,977,682
Natur-Tec® net sales			1,617,345				1,046,755
Total net sales		$	9,702,023			$	7,024,437

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

		November 30, 2016				% of Product Sales*				November 30, 2015				% of Product Sales*
Direct cost of goods sold
ZERUST®		$	4,699,537				58.1%			$	3,364,555				56.3%
Natur-Tec®			1,213,168				75.0%				834,259				79.7%
Indirect cost of goods sold			700,061				NA				676,609				NA
Total net cost of goods sold		$	6,612,766							$	4,875,423

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

		Three Months Ended
		November 30, 2016				November 30, 2015
Inside the U.S.A. to unaffiliated customers		$	5,268,999			$	4,813,260
Outside the U.S.A. to:
Joint ventures in which the Company is a shareholder directly and indirectly			701,799				549,546
Unaffiliated customers			3,731,225				1,661,631
		$	9,702,023			$	7,024,437

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

		At November 30, 2016				At August 31, 2016
China		$	224,270			$	253,931
India			12,421				13,645
Germany			18,024				—
Brazil			60,546				66,938
United States			8,175,442				8,219,955
Total long-lived assets		$	8,490,703			$	8,554,469

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

		Three Months Ended
		November 30, 2016				November 30, 2015
China		$	1,546,810			$	679,755
India			331,610				278,690
Germany			118,259				—
Brazil			601,524				448,268
Other			1,133,022				254,918
United States			5,970,798				5,362,806
Total net sales		$	9,702,023			$	7,024,437

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, 2016				% of Total Fees for Services Provided to Joint Ventures				November 30, 2015				% of Total Fees for Services Provided to Joint Ventures
Germany		$	203,000				15.4	%		$	229,785				15.5	%
Poland			149,204				11.3	%			139,257				9.4	%
Thailand			147,455				11.2	%			223,741				15.1	%
Japan			146,037				11.1	%			130,673				8.8	%
South Korea			105,378				8.0	%			169,402				11.4	%
France			97,673				7.4	%			89,673				6.0	%
Sweden			87,061				6.6	%			72,961				4.9	%
United Kingdom			86,131				6.5	%			108,911				7.3	%
Finland			76,336				5.8	%			68,933				4.6	%
Czech Republic			70,828				5.4	%			57,553				3.9	%
India			64,535				4.9	%			80,451				5.4	%
Other			81,953				6.2	%			114,089				7.7	%
		$	1,315,591				100.0	%		$	1,485,429				100.0	%

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