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Note 12 - Geographic and Segment Information (Tables)

6 Months Ended

Feb. 28, 2015

Note 12 - 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, 2015				February 28, 2014				February 28, 2015				February 28, 2014
Inside the U.S.A. to unaffiliated customers			61.4	%			62.1	%			64.3	%			66.6	%
Outside the U.S.A to:
Joint ventures in which the Company is a shareholder directly and indirectly			16.9	%			12.9	%			14.1	%			11.7	%
Unaffiliated customers			21.7	%			25.0	%			21.6	%			21.7	%
			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, 2015				February 28, 2014				February 28, 2015				February 28, 2014
ZERUST® sales		$	5,783,985			$	5,555,051			$	12,022,056			$	11,304,064
Natur-Tec™ sales			944,724				663,957				1,920,748				1,224,044
Total net sales		$	6,728,709			$	6,219,008			$	13,942,804			$	12,528,108

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

		Three Months Ended																Six Months Ended
		February 28, 2015				% of Product Sales*				February 28, 2014				% of Product Sales*				February 28, 2015				% of Product Sales*				February 28, 2014				% of Product Sales*
Direct cost of goods sold
ZERUST®		$	3,171,103				54.8	%		$	2,965,790				53.4	%		$	6,509,691				54.1	%		$	6,047,554				53.5	%
Natur-Tec®			719,048				76.1	%			490,573				73.9	%			1,501,623				78.2	%			940,037				76.8	%
Indirect cost of goods sold			767,589				—				595,470				—				1,453,037				—				1,222,273				—
Total net cost of goods sold		$	4,657,740							$	4,051,833							$	9,464,351							$	8,209,864

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

		As of February 28, 2015				As of August 31, 2014
Brazil		$	1,065,105			$	1,429,054
China			1,268,072				—
India			359,992				363,894
United States			47,411,333				52,264,827
Total assets		$	50,104,502			$	54,057,775

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

		Six Months Ended
		February 28, 2015				February 28, 2014
Brazil		$	1,418,236			$	1,153,012
China			20,732				—
India			416,772				168,779
United States			12,087,064				11,206,317
Total net sales		$	13,942,804			$	12,528,108

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

		Six Months Ended
		February 28, 2015				February 28, 2014
Brazil		$	(41,559	)		$	(145,955	)
China			(358,168	)			—
India			(9,246	)			5,800
United States			2,184,424				3,307,688
Total operating income		$	1,775,451			$	3,167,533

Fees For Services Provided to Joint Ventures [Member]

Note 12 - Geographic and Segment Information (Tables) [Line Items]

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

		Three Months Ended
		February 28, 2015				% of Total Fees for Services Provided to Joint Ventures				February 28, 2014				% of Total Fees for Services Provided to Joint Ventures
Germany		$	202,633				20.4	%		$	263,556				12.8	%
Thailand			156,519				15.7	%			130,441				6.3	%
Japan			124,202				12.5	%			167,410				8.2	%
Poland			116,612				11.7	%			152,518				7.4	%
United Kingdom			115,000				11.6	%			79,935				3.9	%
France			76,518				7.7	%			122,972				6.0	%
India			73,971				7.4	%			166,858				8.1	%
Sweden			72,297				7.3	%			92,223				4.5	%
Finland			52,693				5.3	%			76,537				3.7	%
China			—				0.0	%			523,451				25.4	%
Other			4,415				0.4	%			281,770				13.7	%
		$	994,860				100.0	%		$	2,057,671				100.0	%

		Six Months Ended
		February 28, 2015				% of Total Fees for Services Provided to Joint Ventures				February 28, 2014				% of Total Fees for Services Provided to Joint Ventures
Germany			440,954				14.1	%			527,111				12.6	%
Thailand			297,152				9.5	%			282,999				6.8	%
Japan			284,544				9.1	%			340,691				8.2	%
Poland			287,836				9.2	%			317,085				7.6	%
United Kingdom			211,371				6.8	%			154,632				3.7	%
France			209,898				6.7	%			251,075				6.0	%
India			143,262				4.6	%			166,858				4.0	%
Sweden			159,217				5.1	%			202,193				4.8	%
Finland			146,215				4.7	%			181,740				4.4	%
China		$	516,139				16.5	%		$	1,111,633				26.7	%
Other			431,942				13.7	%			631,302				15.2	%
		$	3,128,530				100.0	%		$	4,167,319				100.0	%

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