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Note 10 - Geographic And Segment Information (Tables)

6 Months Ended

Feb. 28, 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								Six Months Ended
		February 28, 2014				February 28, 2013				February 28, 2014				February 28, 2013
Inside the U.S.A. to unaffiliated customers			62.1	%			65.6	%			66.6	%			68.4	%
Outside the U.S.A to:
Joint ventures in which the Company is a shareholder directly and indirectly			12.9	%			18.2	%			11.7	%			16.8	%
Unaffiliated customers			25.0	%			16.2	%			21.7	%			14.8	%
			100.0	%			100.0	%			100.0	%			100.0	%

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

		Three Months Ended								Six Months Ended
		February 28, 2014				February 28, 2013				February 28, 2014				February 28, 2013
ZERUST® sales		$	5,555,051			$	4,710,412			$	11,304,064			$	9,505,695
Natur-Tec™ sales			663,957				535,938				1,224,044				1,032,402
Total net sales		$	6,219,008			$	5,246,350			$	12,528,108			$	10,538,097

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

		Three Months Ended																Six Months Ended
		February 28, 2014				% of Product Sales*				February 28, 2013				% of Product Sales*				February 28, 2014				% of Product Sales*				February 28, 2013				% of Product Sales*
Direct cost of goods sold
ZERUST®		$	2,965,790				53.4	%		$	2,623,070				55.7	%		$	6,047,554				53.5	%		$	5,267,365				55.4	%
Natur-Tec®			490,573				73.9	%			453,147				84.6	%			940,037				76.8	%			892,820				86.5	%
Indirect cost of goods sold			595,470				—				557,696				—				1,222,273				—				1,164,700				—
Total net cost of goods sold		$	4,051,833							$	3,633,913							$	8,209,864							$	7,324,885

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

		As of February 28, 2014				As of August 31, 2013
Brazil		$	934,780			$	1,193,373
India			332,217				—
North America			49,554,310				47,860,576
Total assets		$	50,821,307			$	49,053,949

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

		Six Months Ended
		February 28, 2014				February 28, 2013
Brazil		$	1,153,012			$	1,131,469
India			168,779				—
North America			11,206,317				9,406,628
Total net sales		$	12,528,108			$	10,538,097

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

		Six Months Ended
		February 28, 2014				February 28, 2013
Brazil		$	(145,955	)		$	(106,759	)
India			5,800				—
North America			3,307,688				1,950,278
Total operating income		$	3,167,533			$	1,843,519

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
		February 28, 2014				% of Total Fees for Services Provided to Joint Ventures				February 28, 2013				% of Total Fees for Services Provided to Joint Ventures
China		$	523,451				25.4	%		$	450,586				25.4	%
Germany			263,556				12.8	%			249,513				14.1	%
Japan			167,410				8.2	%			169,205				9.6	%
India			166,858				8.1	%			—				0.0	%
Poland			152,518				7.4	%			154,839				8.7	%
Thailand			130,441				6.3	%			148,303				8.4	%
France			122,972				6.0	%			147,896				8.3	%
Korea			108,797				5.3	%			123,388				7.0	%
Sweden			92,223				4.5	%			77,627				4.4	%
United Kingdom			79,935				3.9	%			35,754				2.0	%
Finland			76,537				3.7	%			72,329				4.1	%
Other			172,973				8.4	%			141,441				8.0	%
		$	2,057,671				100.0	%		$	1,770,881				100.0	%

		Six Months Ended
		February 28, 2014				% of Total Fees for Services Provided to Joint Ventures				February 28, 2013				% of Total Fees for Services Provided to Joint Ventures
China		$	1,111,633				26.7	%		$	943,897				26.1	%
Germany			527,111				12.6	%			492,213				13.6	%
Japan			340,691				8.2	%			371,186				10.3	%
Poland			317,085				7.6	%			266,311				7.4	%
Thailand			282,999				6.8	%			301,989				8.4	%
Korea			270,221				6.5	%			262,131				7.2	%
France			251,075				6.0	%			276,398				7.6	%
Sweden			202,193				4.8	%			164,619				4.6	%
Finland			181,740				4.4	%			160,180				4.4	%
India			166,858				4.0	%			—				0.0	%
United Kingdom			154,632				3.7	%			102,812				2.8	%
Other			361,081				8.7	%			275,422				7.6	%
		$	4,167,319				100.0	%		$	3,617,158				100.0	%

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