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Note 10 - Geographic and Segment Information (Tables)

9 Months Ended

May 31, 2014

Note 10 - 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, 2014				May 31, 2013				May 31, 2014				May 31, 2013
Inside the U.S.A. to unaffiliated customers			69.0	%			69.8	%			67.4	%			68.9	%
Outside the U.S.A to:
Joint ventures in which the Company is a shareholder directly and indirectly			13.6	%			11.1	%			12.4	%			14.9	%
Unaffiliated customers			17.4	%			19.1	%			20.2	%			16.2	%
			100.0	%			100.0	%			100.0	%			100.0	%

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

		Three Months Ended								Nine Months Ended
		May 31, 2014				May 31, 2013				May 31, 2014				May 31, 2013
ZERUST® sales		$	5,992,095			$	5,418,271			$	17,296,159			$	14,923,966
Natur-Tec™ sales			928,725				458,762				2,152,769				1,491,164
Total net sales		$	6,920,820			$	5,877,033			$	19,448,928			$	16,415,130

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

		Three Months Ended																Nine Months Ended
		May 31, 2014				% of Product Sales*				May 31, 2013				% of Product Sales*				May 31, 2014				% of Product Sales*				May 31, 2013				% of Product Sales*
Direct cost of goods sold
ZERUST®		$	3,288,809				54.9	%		$	3,115,980				57.5	%		$	9,336,363				54.0	%		$	8,383,345				56.2	%
Natur-Tec®			695,778				74.9	%			367,485				80.1	%			1,635,815				76.0	%			1,260,305				84.5	%
Indirect cost of goods sold			684,735				—				570,899				—				1,907,008				—				1,735,599				—
Total net cost of goods sold		$	4,669,322							$	4,054,364							$	12,879,186							$	11,379,249

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

		As of May 31, 2014				As of August 31, 2013
Brazil		$	1,080,330			$	1,193,373
India			358,423				—
North America			50,750,114				47,860,576
Total assets		$	52,188,867			$	49,053,949

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

		Three Months Ended								Nine Months Ended
		May 31, 2014				May 31, 2013				May 31, 2014				May 31, 2013
Brazil		$	712,125			$	567,615			$	1,865,137			$	1,699,084
India			192,921				—				361,700				—
North America			6,015,774				5,309,418				17,222,091				14,716,046
Total net sales		$	6,920,820			$	5,877,033			$	19,448,928			$	16,415,130

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

		Three Months Ended								Nine Months Ended
		May 31, 2014				May 31, 2013				May 31, 2014				May 31, 2013
Brazil		$	70,464			$	(156,594	)		$	(75,491	)		$	(263,353	)
India			72				—				5,872				—
North America			1,694,695				1,650,365				5,002,383				3,600,643
Total operating income		$	1,765,231			$	1,493,771			$	4,932,764			$	3,337,290

Fees For Services Provided to Joint Ventures [Member]

Note 10 - Geographic and Segment Information (Tables) [Line Items]

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

		Three Months Ended
		May 31, 2014				% of Total Fees for Services Provided to Joint Ventures				May 31, 2013				% of Total Fees for Services Provided to Joint Ventures
China		$	478,979				23.9	%		$	524,724				27.3	%
Germany			257,215				12.8	%			250,000				13.0	%
India			204,777				10.2	%			—				0.0	%
Japan			170,079				8.5	%			177,432				9.3	%
Poland			152,157				7.6	%			113,339				5.9	%
Thailand			148,113				7.4	%			169,085				8.8	%
France			139,719				7.0	%			104,645				5.5	%
Sweden			130,613				6.5	%			141,000				7.4	%
United Kingdom			127,697				6.4	%			65,193				3.4	%
Finland			87,416				4.4	%			85,246				4.4	%
Czech			71,489				3.6	%			55,322				2.9	%
Other			33,351				1.7	%			231,961				12.1	%
		$	2,001,775				100.0	%		$	1,917,947				100.0	%

		Nine Months Ended
		May 31, 2014				% of Total Fees for Services Provided to Joint Ventures				May 31, 2013				% of Total Fees for Services Provided to Joint Ventures
China		$	1,590,612				25.8	%		$	1,468,622				26.5	%
Germany			784,326				12.7	%			742,213				13.4	%
Japan			510,769				8.3	%			548,618				9.9	%
Poland			469,242				7.6	%			379,650				6.9	%
Thailand			431,112				7.0	%			471,074				8.5	%
France			390,794				6.3	%			381,043				6.9	%
India			371,635				6.0	%			—				0.0	%
Sweden			332,806				5.4	%			305,619				5.5	%
United Kingdom			282,329				4.6	%			168,005				3.1	%
Finland			269,155				4.4	%			245,426				4.4	%
Czech			229,230				3.7	%			147,741				2.7	%
Other			507,084				8.2	%			677,094				12.2	%
		$	6,169,094				100.0	%		$	5,535,105				100.0	%

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