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Note 11 - Geographic And Segment Information (Tables)

3 Months Ended

9 Months Ended

May 31, 2013

May 31, 2013

Note 11 - Geographic And Segment Information (Tables) [Line Items]

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

		Three Months Ended								Nine Months Ended
		May 31, 2013				May 31, 2012				May 31, 2013				May 31, 2012
Inside the U.S.A. to unaffiliated customers			69.8	%			58.0	%			68.9	%			61.2	%
Outside the U.S.A to:
Joint ventures in which the Company is a shareholder directly and indirectly			11.1	%			10.9	%			14.9	%			12.6	%
Unaffiliated customers			19.1	%			31.1	%			16.2	%			26.2	%
			100.0	%			100.0	%			100.0	%			100.0	%

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

		Nine Months Ended
		May 31, 2013				% of Total Fees for Services Provided to Joint Ventures				May 31, 2012				% of Total Fees for Services Provided to Joint Ventures
China*		$	1,468,622				26.5	%		$	—				0.0	%
Germany			742,213				13.4	%			742,171				21.3	%
Japan			548,618				9.9	%			763,548				22.0	%
Thailand*			471,074				8.5	%			—				0.0	%
Korea**			409,997				7.4	%			138,149				4.0	%
France			381,043				6.9	%			397,123				11.4	%
Poland			379,650				6.9	%			341,603				9.8	%
Sweden			305,619				5.5	%			446,191				12.8	%
Finland			245,426				4.4	%			378,751				10.9	%
United Kingdom			168,005				3.1	%			244,017				7.0	%
India			—				0.0	%			(192,758	)			(5.5	)%
Other			414,838				7.5	%			218,920				6.3	%
		$	5,535,105				100.0	%		$	3,477,715				100.0	%

		Three Months Ended								Nine Months Ended
		May 31, 2013				May 31, 2012				May 31, 2013				May 31, 2012
ZERUST® sales		$	5,418,271			$	7,220,258			$	14,923,966			$	16,243,683
Natur-Tec™ sales			458,762				584,646				1,491,164				1,367,663
		$	5,877,033			$	7,804,904			$	16,415,130			$	17,611,346

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

		Three Months Ended																Nine Months Ended
		May 31, 2013				% of Product Sales*				May 31, 2012				% of Product Sales*				May 31, 2013				% of Product Sales*				May 31, 2012				% of Product Sales*
Direct cost of goods sold
ZERUST®		$	3,115,980				57.5	%		$	3,046,644				42.2	%		$	8,383,345				56.2	%		$	8,074,031				49.7	%
Natur-Tec®			367,485				80.1	%			501,749				85.8	%			1,260,305				84.5	%			1,160,014				84.8	%
Indirect cost of goods sold			570,899				—				595,121				—				1,735,599				—				1,599,027				—
Total net cost of goods sold		$	4,054,364							$	4,143,514							$	11,379,249							$	10,833,072

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

		At May 31, 2013
		Brazil				North America				Total
Total assets		$	1,308,385			$	45,202,928			$	46,511,313

		At August 31, 2012
		Brazil				North America				Total
Total assets		$	1,744,693			$	40,132,934			$	41,877,627

Schedule of Segment Reporting Information, by Segment [Table Text Block]

		Nine Months Ended May 31, 2013
		Brazil				North America				Total
Net sales		$	1,699,084			$	14,716,046			$	16,415,130
Operating income		$	(263,353	)		$	3,600,643			$	3,337,290

		Nine Months Ended May 31, 2012
		Brazil				North America				Total
Net sales		$	4,004,399			$	13,606,947			$	17,611,346
Operating income		$	1,780,269			$	2,382,388			$	4,162,657

Fees For Services Provided to Joint Ventures [Member]

Note 11 - Geographic And Segment Information (Tables) [Line Items]

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

		Three Months Ended
		May 31, 2013				% of Total Fees for Services Provided to Joint Ventures				May 31, 2012				% of Total Fees for Services Provided to Joint Ventures
China*		$	524,724				27.3	%		$	—				0.0	%
Germany			250,000				13.0	%			241,338				32.9	%
Japan			177,432				9.3	%			260,026				35.4	%
Thailand*			169,085				8.8	%			—				0.0	%
Korea**			147,867				7.7	%			61,152				8.4	%
Sweden			141,000				7.4	%			141,257				19.2	%
Poland			113,339				5.9	%			113,305				15.4	%
France			104,645				5.5	%			128,480				17.5	%
Finland			85,246				4.4	%			127,344				17.3	%
United Kingdom			65,193				3.4	%			83,879				11.4	%
India			—				0.0	%			(492,602	)			(67.1	)%
Other			139,416				7.3	%			70,158				9.6	%
		$	1,917,947				100.0	%		$	734,337				100.0	%

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